How are people forgetting that watching a movie on the plane works perfectly fine with any tablet and a set of wireless earphones??
In reality, it always sucks for those things. Crap in seat displays, crook neck on a tablet/book, no comfortable typing position, etc.
I mean it it works, but I wouldn't say its ideal - particularly in cattle class.
So weather this is the solution or not, I don't know, but think theres definitely _something_ in a compact, portable 'Head Up - Hands Down' device form factor.