The description there seems to be more about streaming (2D) XB1 games to VR than supporting VR on XB1. So if you have an XB1 and a VR PC, you can run XB1 games on the PC, instead of, you know, actual VR games on that PC.
Or rather, it's XB1 game streaming/RemotePlay only sent to a headset instead of a standard display.
Or rather, it's XB1 game streaming/RemotePlay only sent to a headset instead of a standard display.