Nvidia has all but backed out of the mobile chip market, and those chips are what this line used. So that's why we haven't seen any updates in years. But the good news is they have made a new chip for Nintendo's next-gen switch coming out sometime next year. So within a year of that coming out, I would expect to finally see a new Shield or Nvidia TV or whatever they call it, using a similar chip to what goes in the Switch 2
Switch 2 launch: we heard you all say you wanted better battery life, so we delivered, 3x the battery life for the same performance! Get your switch 2 today, all switch games will work on switch 1 or 2!
Nintendo traditionally has only broken backwards compatibility as part of a major change in form factor. The Wii could play Gamecube games, the Wii U could play Wii games. The Gameboy Colour could play Gameboy games, the Gameboy Advance could play Gameboy Colour games, the DS could play Gameboy Advance games, the 3DS could play DS games.
Given the Switch 2 is still a hybrid handheld, it would be out of character for them to break it.
The oled switch chip has way higher performance than switch v1, but its just underclocked so it has the same. You can overclock it so you have 60 fps in the botw. But the battery life and thermals suffer.
Not the worst, but I'd like the ability to have consistent 30fps across the board for all titles if we're going for 2x the battery life. 60fps for the same battery life would be even better!