While support for V-Sync disable is closely related to supporting G-Sync and Freesync, it is not a surprise that Microsoft plans to update and fix both these issues in the Universal Windows Platform (UWP).
As you may know, currently there is no way to disable V-Sync in games on the Windows Store, but it appears that the fix is coming in May.
Most importantly, Spencer added that the company is definitely listening to feedback from both developers and the community, which means that there is still hope for the Universal Windows Platform.