Was there any person out there that wanted a tablet that is 18 inches?
*Raises hand*
I actually want one that is 20-1/4", the same size as a sheet of tabloid sized paper, but I'd settle for one about 14", the size of a sheet of letter sized paper. In an ideal world, it'd have an e-ink display.
If you know who, can you go beat them with a rubber hose.
Fuck you, too, I guess?
The weight will be insane, there is no avoiding it... it's just a matter how terrible it will be, not a question of IF.
A portable 18" LCD monitor weighs about 2-1/2 pounds, and I'm sure you could take some of the weight out of that. Fitting a hypothetical 18" ipad into a roughly ~3lbs envelope seems reasonable.
Aside from a few niche areas, this will struggle to find a problem, where it is an optimal solution.
Niche at first, but I think engineering and manufacturing would eat them up in the long run.