This is a very good move for valve. ARM emulation of x86 is the future. We are talking running GTA V on a 15w cell phone instead of a 400W desktop.
>>1729026
X86_64 emulation on ARM is surprisingly fast. People on reddit con/r/androidemulation have full PC games running. The biggest bottleneck seems to be inflated RAM requirements. It's probably intended to be used with a PC, and the local OS is just for minor portable use.
>>1730835
VR is only a meme, because it requires an expensive headset AND a top of the line PC to be a good experience. You also need a dedicated space and can't do it in a busy living room. It's very niche.
Using ARM to emulate x86 is huge, because it opens up the possibility of PC games being ported. Valve standardizing the OS means you won't need to weak much. A VR port should just werk. If they can fit a big enough GPU, it might not need a desktop which is 1/2 the cost.
Furthermore it's low power. It can be battery powered if it's running on ARM. No wires, ever.