One technology that has me excited along with the Oculus Rift is Sixense Entertainment's STEM System, which is currently on Kickstarter. Sixense had an original goal of $250,000 but they are now at $531,448 at the time of writing.
The developer has added a new stretch goal to its Kickstarter campaign, which would see them add STEM support for both Android and iOS devices if they reach $700,000. There's another 17 days for this to happen, so we should see them hit this goal quite easily. The Kickstarter campaign reads: "An updated Sixense software development kit will support Android 3.2 or higher and iOS 6 and higher, allowing STEM System developers to bring Sixense motion tracking to a huge installed base of mobile devices."
It also adds: "Our video above shows a virtual camera application for which we've heard a lot of requests. The STEM System running on Android and iOS will enable applications like the virtual camera, or even the ability to turn a mobile device into a VR head-mounted display."