These devices are small tablet computers, some with and some without a physical keyboard, that allow you to connect to the Internet and run a number of applications in miniature versions. Some smart phones are basically MID's that happen to also be phones. I'd put the iphone into that category, as well as any phone with a screen that size and equivalent functionality. So, in my book, the Nokia N80 doesn't count (too small of a screen for comfortable web-browsing) but the HTC Android phone does count. My broad description, including phones, is not necessarily canonical. I do think that it's logical, however.
These devices generally have a browser, some sort of IM/chat facility, some sort of office document reader and sometimes document editors, a music and/or video player, and games. Some MID's run a version of Windows Vista. Others run a version of Linux. Of course, if you know me at all, you know that I want Linux on my MID, because I want freedom (as in speech) with my software as much as is possible. The good news is that it's possible to run a version of Linux on nearly all MID's today thanks to the work of groups like Moblin.org. So, knowing that, what's really important in an MID?
There are a few harware things that I think are vital. A usable keyboard is way up there, in my estimation, although a really good *handwriting recognition interface would satisfy me just as well. A **screen size that allows for easy reading is important, too. A camera is nice, but not vital, since my main digital camera is generally on my cell phone.
Software-wise, I don't want to be hobbled. I don't want the system to lock me out of the terminal window, or force me into contortions of geekish heroics just to install non-approved software. I don't want Big Brother telling me what I can and cannot run on my MID. It's mine, gosh darn it. If I bought it, I want to use it however I choose. Can you imagine buying a refrigerator and being told that your warranty would be void if you chose to refrigerate any non-food items? What if you choose to refrigerate photographic film? Or pre-cool glasses so that you can have a proper cold one?
The Samsung Q1 is my favorite device in terms of screen size and heft. I feel like I could get WORK done on that thing, as well as play, read RSS feeds on the way to work and otherwise do most of the tasks that make up most of my non-programming computing life. What I don't like about it is the keyboard. Actually, the keyboard is ALMOST right. The placement under the user's thumbs at the top of the screen is fantastic, but it's just too hard to do shifting and number typing. Fix that, and the Samsung Q1 running an imaginary version of Moblin would be first choice all around.
I've played pretty extensively with the Lenovo ideapad U8, and I'd really *like* to like that device, too, but it just doesn't cut it for me. If I spoke and wrote Chinese as my primary language, my opinion would probably be a bit different. The stroke-based keypad on the telephone dial pad is probably a comfortable way to type Chinese. If you've done much smsing, though, you already know what a pain that kind of keypad is for extensive entry in most other writing systems. The fact that the midinux software on the device is super hobbled is also a pain. In early versions of the device you couldn't even get a terminal window unless you know the "cheat code", so to speak. (Ctrl-alt-backspace and then F2) In later versions, at least you'll have an x-terminal available by default. Still, the packaging system is wonky, and the GUI is funky and uncomfortable.
You may have noticed that when I was talking about the Samsung Q1 I wanted an imaginary version of Moblin. Well, that's a thing, see? Moblin just isn't what it could be, yet. I'm personally not all that thrilled about the fact that they've just changed from a debianish system to a red hattish system, either, but that's beside the point. The problem with Moblin on the devices that I've tried it with has been far more basic than that. The applications just aren't quite there yet. They, almost without exception, get things wrong when converting their interface into the smaller space. Buttons don't show up right. Text inputs get messed up. Scroll bars are in the wrong places or not there at all.
One of the biggest problems across the board with Moblin apps and system controls is that they are unaware of whether the screen keyboard is being used. That means that they hide important dialogs and even buttons under that keyboard in the screen real estate, and you simply can't DO anything. The only solution is to plug in an external keyboard to get some tasks done.
So far, the best all around experience I've had has been with the Nokia N810 running the new maemo version, 4.1.1 Diablo. It was easy to find and get software. It was easy to get into a terminal window and easy to do things there. The pull down keyboard was comfortable in my hands and I was able to type fairly quickly with it. The touch screen worked well, and the applications were lovely. I didn't see any of the problems that I've encountered with Moblin apps, which makes me wonder why there maemo apps aren't being ported to Moblin instead of desktop apps getting Moblinized.
I've got this fantasy of a cell phone/MID device that will be bigger than the Nokia N810 but smaller than the Samsung Q1, have enough storage to make it useful as a multimedia device, run on Intel ATOM architecture or an equivalent for power and speed, have a usable keyboard AND handwriting recognition, a camera on the back (they are so useful for things like barcode reading!) and bluetooth so that I can connect an earpiece. Of course it will have wifi and 3G, because let's face it, there's no reason I should have to carry BOTH a telephone and this little baby, when I can have it all in one. Seriously, with a bluetooth earpiece it doesn't matter how big the device running the 3G connection is, and you really shouldn't be talking with the phone up to your face anyway! This device would either run maemo, which I think is an absolutely lovely OS, or else Android, which makes me all weak in the knees and giddy with excitement at the thought.
When this device is born I will love it, take good care of it, and write software for it. It'll come with me on the bus and on the plane and in doctor's and vet's waiting rooms. It will sit with me in coffee shops, and hang out with me on the couch in my living room. I think I've been dreaming of this device since I was a kid, while sitting in front of the tv, watching endless Star Trek reruns. I'm wondering when I'm going to get to
*Am I the only one on the planet who misses the Palm Graffiti?
**I think I'm killing my eyes reading RSS feeds on my way to work on the tiny N80 screen.