[Xixi]

I think there is a business case, even for FPS. FPS are typically played online, so you are already dealing with lag. And a worst case of lag is already going to get you killed, whether the game is streamed or not.

Besides the light is not so slow. I ping Google in ~12ms (from Osaka). Even for a FPS that's good enough for most people, especially if the alternative is forking a non trivial amount of money. I mean most people play FPS with gamepads, so it's not like the threshold in terms of quality is particularly high to begin with.

How many gamers within reach of a datacenter in Seoul? in Paris? in Berlin? in San Francisco? in New-York City? Sure it won't work for you, but that certainly doesn't mean there is no business case.