I agree about opening this UE4 section up. Unity Pro is required and that one is open. Is there something on Epics side holding it from being available?
Just started working with this as well, its awesome. Rift support (stereoscopic output) so far seems to be available automatically. All demos I've tried can be enabled for the rift by opening the command prompt when playing through a standalone window and running the command "stereo on" (without quotes). works amazingly! Cannot wait for 4.1 and the Elemental demo!!!