This isn't going to bring any new local games to Linux, rather it "solves" the gaming problem by simply making these streaming games playable on Linux with Chrome, same as on Windows, Mac, on your TV with ChromeCast, tablets, phones etc.

Much like web apps, YouTube, Netflix etc. today already work flawlessly on Linux, so will gaming too with this development. For most people, the browser is already the only "native" desktop application they use on their computers.

Web apps and web video finally made the Linux desktop viable, but also irrelevant in the bigger picture.