preview Window 16:9 Fullscreen?

Is it possible to attach another camera to VR camera for example and play with 2 preview windows ?

By the way, Epics used 16:9 preview window with Vive on Apple WWDC. Hope they’ll finally add this feature in 4.17.

expected 4.17 for july/august ?
I crossing my fingers …

We can only hope this becomes a feature for 4.17

4.17 is released, is this in the build?

Yes you can use the ‘Spectator Screen’ feature now in 4.17 so no custom engine build required anymore - https://docs.unrealengine.com/latest/INT/Platforms/VR/VRSpectatorScreen/index.html