Sure, but I dislike backseat/sideseat watchers. For example I would be to self-consious to watch Game of Thrones / House of the Dragon on the plane, because of sudden nudity or bloody violence.
Coming up to long/medium flights I've often thought, cool - a period of distraction free time, I can read, watch films, write, play video games.
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.
I find a tablet works pretty well for reading or watching movies. (And, really, planes are the main place I use mine.) I never try to take my laptop out though; it's too awkward to type.