The secret sauce will be upscaleing DLSS when hooked up to the TV.
Seriously, all the switch 2 needs, is just abit more power, better storage.... and a upscale tech like DLSS.
Maybe active cooling? like there could be a fan on the Dock? so it can push clocks abit futher when docked?
*edit: Saw permas message above, and agree with him, like its 2023, its time for Nintendo to also support VRR.
(which alot of mobile phones/laptops even have, to reduce battery consumption, when not gameing ect. (more typical use))
(the fact that it can reduce frame tearing, was originally just the cherry on top. Now VRR is everywhere, tvs and pcs, laptops, phones ect)