This is a weird one, but I’d love to see a reimplementation of the sensor bar. The gyro controls haven’t cut it for me. I like how the Wii U game pad had the sensor bar built in to the bezel. The real engineering nightmare would be squeezing IR cameras into the top of the Joycon
Backwards Compatibility. I want this so much so that if the Switch 2 isn’t backwards compatible, I’m very unlikely to buy one.
I’d go as far as making a dedicated emulator box with high end graphics just to avoid buying it.