Hang on a minute here, YOU are designing a tablet?.

What pcb design proggy are you using? and just where will you get the protortype built? and how are you going to source single batch components from to build this protortype tablet?.

Oh i got many questions like how are you going to actually solder down such components as the cpu for instance, oh and what cpu will you be thinking of using? (among the many other multi functional components).

Are you designing a single or multi layer pcb(s)?.

Have you got a team of software designers working for you?.

This is for sure a windup thread.

PS the answers to this post will be interesting to read i am sure.