WALL·E

The Axiom's full-service automation, presided over by AUTO.

Passengers recline in hover-chairs with screens inches from their faces, drinking liquid meals, never walking, never turning to look at the person beside them. Bone density is gone. Nobody has noticed.

Enforced idleness — Everything is provided, so nothing is left to do — and that turns out to be unbearable.

The best answer in any medium, and it is delivered almost wordlessly. Forster needed a novella for this.