I looked up Xbox One because the post I replied to said Xbox One power level was not possible in a handheld.
So Tegra Odin suggests XSS is already possible in handheld, but the battery life would suck, correct?
a portable Series S is absolutely possible, but it won't be financially viable until like 3 years down the line I think.
the Steam Deck itself is a better indicator tho than the Tegra chipsets by Nvidia.
the Deck is already 1.6TF peak and uses the exact same architecture as the Series S.
if we assume a steady increase in performance with the same power draw as the Deck then 3 years should be when a mobile RDNA and Ryzen SoC as powerful as the Series S should be possible.
the real question is if Microsoft wants to do that, but I think they absolutely could.
I think if Nintendo uses the SoC that has been leaked a few months backl, the system in Handheld mode will be more like 2TF, which is absolutely enough for a handheld. i just hope that they don't underclock the Docked mode again like they did with the Switch 1... because that was entirely unnecessary as we now due to modded systems playing games just fine at max clock speeds of the original X1 (the Mariko revision could run even faster tho)