i'm not sure if i should use the word "tablet" as it means so many different things to different people... i just know that i want a device very much like the N900, only with a slighty larger screen. the form factor of the N810 would be cool. screen size between 4" and 5", not bigger.

that's one thing.

the 10" device - i don't know. it will have "i could as well use my notebook and enjoy a real keyboard" written all over it.
OTOH, i remember a thread about computing for the elderly... I said back then that I can see a market for 17" touch devices running a Maemo-like UI, only blown up in size. I still think this market exists, it's just probably not profitable yet. (Although I would love being able to let my father try one of those super-size-tablets)