As I travel a lot, I would love to see a true eco mode for my laptop. Something that would keep my fans quiet (2500rpm max).
Some games allow for FPS capping and lower settings, but it’s not always the case. Sometimes tweaking the settings doesn’t seem to make any difference to power consumption. Sometimes your only way to cap FPS is to rely on VSync, which doesn’t make much when you play on 120Hz screen.
Metro Exodus is a good example of an almost impossible to tweak game.
I think it would be nice to have a dedicated travelling mode. It would effectively help people with lower specs and entice developers to produce a more efficient code, rather than pushing for costly gears.
As a developer myself I know very well it costs money. But if I had a wish to make I’ll go for this one