I also don't think that the N810 will be the end of the line. Nokia already announced the next tablet (even if it's only a N800 or N810 with WiMAX). You should keep in mind that internet tablets are not an important market at the moment. But this will be rapidly evolving and Nokia is looking for some strong ground in the post-cellphone era. They are more and more evolving towards an internet company. I think the tablets are an important playground for them.