Too big ! What's the point of having a funky wifi/3G tablet computer that won't fit in your pocket ?
Too expensive ! It's priced like a rich kid's toy.
However Archos, a French firm, have brought out a range of Android tablets with screen sized from 2.8" to 10.1". The small ones make alternatives to iPod Touch. The 7", at half the price of a iPad, would fit in a jacket or coat pocket and make a great wifi-powered or tethered pad for use in cafés or wherever.