It appears that Microsoft is keeping their promise of pulling off 1080p game streaming to your Windows 10 PC - and keeping it nice and smooth with a silky 60fps. This is good news and the update is coming very soon. This is part of the August update and it will be a nice addition to all of those that have bought an Xbox One and it might be a bit of an incentive for those that are thinking about taking the plunge.
1080p/60fps Game Streaming – You can now stream games from your Xbox One to Windows 10 devices in high-res HD quality at 1080p/60fps. The new streaming capability works best for gamers who have home networks with adequate bandwidth. In the Xbox app on Windows 10, go to Settings > Game Streaming and set the video encoding level to Very High, which will then stream games from your Xbox One to your Windows 10 PC at 1080p and 60fps (frames per second).
Source: Xbox Wire