Rumours say the power supply will be 60 watts, paired with Ampere level processing architecture.
There has been rumours that the chip is being made on a 7nm process, rather than 8nm, using Samsung's fab.
Say 40 watts of available GPU power, we could be looking at an RTX GPU with 3TFlops of performance.
That could be enough with DLSS to get XBox Series S performance in docked mode, maybe half that in portable.
The CPU being ARM could limit it, but we could also have more memory than Series S available to games, though mobile chips probably won't have the bandwidth of the XBox.
Hopefully NVidia's compression tech can compensate for the lower bandwidth, but it should be a decent upgrade over Switch and I think it will be impressive once devs cater to it as a platform.
I can't wait to see what the next Zelda, Splatoon or Mario Kart look and perform on a device with that level of technology.
Interested to see whether the recent rumours of it being able to stream to the dock wirelessly while undocked physically, though it will likely be limited to portable performance, but that would be a nice idea for quality of life and give players options.