Comment by ThatPlayer

Games aren't running on GPUs directly; they're using APIs like DirectX for Xbox. As long as the GPU implements the APIs properly it should be fine. RISC-V Linux with a desktop PCI-E AMD GPU and Linux kernel drivers can run games already: https://youtu.be/qHLKB39xVkw, limited by the power of the RISC-V CPU here.

I'm wondering if they would still aim for a single chip when moving to ARM. AMD (and Intel) don't make ARM chips. Nvidia does, and is probably what the next Switch will use. Qualcomm does have proper DX12 support on Windows ARM, but who knows how that'll scale since they make mostly mobile GPUs. Intel had similar problems scaling their iGPUs for Arc.