It's rather incredible how misguided MIDs are, up to now. Make them about three quarters of their current size and they'll be reasonably pocketable, or at least attractively thin. (There's lots of money for whoever makes something just like the pads in Star Trek).
But no, they just have to be crazy thick, be bloated with track pads and keyboards under the screen (not the sliding type) and run Windows Vista for, uh, no good reason...

I actually call my N8*0 an MID sometimes, because Intel's marketing at least got farther than Nokia's. It's the only good one, at any rate.

Edit:
Mixing things up. 'My bad. The bigness point still stands