After spending some time this weekend with an Archos 7, which is a 7” tablet, i’m definitely going with that size rather than 10”. It’s just so much more portable than a 10”, almost literally half the size, but i really didn’t feel like i’d lost a lot of screen real-estate. Scrolling vertically doesn’t bother me, it’s only horizontal scrolling that does, and at 7”, i didn’t have to scroll horizontally any more than with a 10”.
Of course at home, the 10” would be preferable, but since the reason why i want a tablet is for portability, the 7” has just sealed the deal for me. I thought it would be too small, but for web-browsing, it was a good experience. Not once did i wished the screen was bigger. And you can use the 7" for things like a GPS in your car, alarm on your desk, or photo gallery, without it looking ridiculously out of place.
So i’m going to have to change my opinion on the 7” tablets now. In fact, I think Apple made a mistake by not releasing a 7” iPad. I’m convinced that there’s a big market for that now, if not a bigger market than a 10”.
I think you can judge for yourself whether a 7” is good enough for you by how you view netbooks. If you think their screens are too small, then the 7” tablets probably won’t be to your tastes. But if you like your netbook size, or your only complaint about netbooks are the keyboards and not the screen, then the 7” tablet will probably suit you.