Just today came across this cool new Jedi Challenges product from Lenovo and Disney. It uses what appears to be a custom headset. Like a Cardboard-style headset, it uses your phone as the computer and display; but a little like Hololens, it is see-through. They use a glowing ball you place on the floor in front of you as a tracking marker to keep the view stable; apparently there are a couple of cameras with fisheye lenses in the headset to locate this (and the lightsaber input device). EDIT: This review has more detail than any others I've seen (and more detail than the official website, too). All in all, a very slick system for $200. Anybody know how/whether we can write more games for this hardware?