i think that the nokia tablet should have some specs which allows to stand out from the masses.
First it definitely should have a polycarbonat (like the lumia 800) body and wacom pen support. (business users!)
It must be easy to conect with a normal pc/notebook (usb!) and it's not necessary to have a big internal storage (8 or 16gb should be enough, rather a little bit cheaper), but it must have a SD-slot!
There should be standards for the construction of windows tablets (bluetooth,usb), because then keyboard docking stations and everything like that would be more popular and cheaper!
Also a better integration of skydive (just do it like dropbox, or better

) would be perfect!
we don't need another ipad clone and in my opinion most of the potential users of a nokia tab don't bother if there is a quad or dual core working inside, it just have to work smooth. Also the resolution of the screen doesn't have to be the best of the world, i would prefer a longer standby and operating time.