Microsoft is now rolling out Xbox One build 1705 to the Alpha ring Insider members. The new build brings many new features announced earlier today. There are other bug fixes and improvements.
Note that not all planned features for this update are available at this time. If you’re on the Xbox Preview Alpha ring, you can check for the latest Insider build 1705.170411-1700 by going to Settings -> System -> Updates.
Also, If your console is in Instant-On mode and you have been selected to receive the update, it will download and install the update and reboot to standby.