That's according to testing done by Tom's Hardware, who found that playing PC games while running the recently launched Nvidia desktop app can reduce in-game frame rates by as much as 15 percent ...

Microsoft is updating the Xbox app on Windows today with hundreds of PC games that weren’t previously available and a new home experience. It’s part of a broader effort to make the Xbox app ...

And yes, in the Xbox app there are quests that ask you to play games on your PC or console and reward you with points that can be exchanged for Xbox store credit. Most people know about that already.