Earlier quoted context omitted.
Your use case is particularly apt for frequent fliers. I've almost had a tray table-supported laptop destroyed on more than one occasion by a reclining passenger in front of me. It would be amazing to just set up a small keyboard+trackpad on my lap and not have to even pull the computer out of its bag. If I could do this, I wouldn't even care how ridiculous I looked.
Also, consider a future where a laptop is just a ~silicone skin over the current "bottom half" of a laptop. Batteries could also be smaller since the screen currently eats so much juice, or it could stay the same size to power the VR headset (but I imagine that the smaller screens would use less juice).
15.1x8x1cm x86-64 computer with a built in 3000mAh battery