"A huge number," maybe, in the sense that the majority of the world's gamers today only play games on their phone, but not the ones spending the most money. People who will pay extra for 144hz 4K monitors or multi-rollover keyboards with obnoxious lighting aren't going to throw the benefit of those things away for a platform that introduces 100-200ms of lag in the game and creates fuzzier graphics than the graphics card they already own is capable of.

The market for this tech is very downmarket. If you try to sell it to the hardcore gamer audience, as Google tried to do, they're going to see right through this.