As I had no experience with Valve’s products, but rather ps4-5 knock-offs, I want them to have one or two scrollwheels with a sensory feedback in the future.
Switching radio stations like in old timea, adjusting your cam’s focus in Outlast-likes, rolling the roulette while gambling in some Yakuza game, switching your equipment in some stealth game - it can certainly has it uses if it wasn’t too weird.
But what idea or part would you like to add to generic controllers and schemes if you had an authority over that one an you had studios to follow this quirk?
If they could take an Xbox One/Series SX controller and add in this order:
Gyroscope
Two extra face buttons (for fighting games)
a rotary dial
a trackball (both primarily for retro games that use them)
a touchpad (or even better a touch screen)
HD Rumble
without making the controller uncomfortable, that would be ideal to me.