I can tell you about KLM’s in Economy which I’ve used. All depends on aircraft type though.

B777/A330 – Seat Back TVs with interactive films/games with pause/play video recorder type functionality (stop/play etc..). Fantastic for when the food trolley arrives or a toilet break is required.

B767/B747/M11 – Aisle TVs. Pretty standard and acceptable but not a patch on the B777/A330.