Again not even sure why people think AMD is good. Nvidia makes better GPUs flat out, the only reason Sony/MS use AMD is because AMD is willing to give them their shoddier tech for cheap.
But Nintendo likely is scoring a sweet deal for the Tegra technology since Nvidia hasn't found other takers for it (no one needs a tablet that powerful and autonomous cars is a niche market for another 3-4 years at least). So that likely isn't an issue either.