SAN FRANCISCO (AP) — It's back. The virtual reality headset, the gizmo that was supposed to seamlessly transport wearers to three-dimensional virtual worlds, has made a remarkable return at this year's Game Developers Conference, an annual gathering of video game makers in San Francisco. After drumming up hype over the past year and banking $2.4 million from crowdfunding, the Irvine, Calif.-based company Oculus VR captured the conference's attention this week with the Oculus Rift, its VR headset that's more like a pair of ski goggles than those bulky gaming helmets of the 1990s that usually left users with headaches.