It's never occurred to me until this very second, but maybe the problem with motion controlled gaming is the lack of resistance.
The more I think about it, the more it makes sense. The best games, in terms of control and feel, have a great feeling of resistance and weight in their controls. With motion controls that often gets lost, particularly with Kinect when you're swinging at the air. The REALM System -- currently being developed in Sydney by two Aussies, a Frenchman and a New Zealander -- uses resistance bands alongside unique technology to provide that feeling of weight. It's also compatible on the Oculus Rift, which makes perfect sense.
The team has already created six games that use the The REALM System, but I'm more excited about the possibilities if entire teams of developers get their hands on the tech. Also: decent fitness games please!
But the technology is one of those things that expands beyond games. The kind of data it can collect could also be helpful with actual hard training, or rehabilitation. I like the idea.
You can find out more about the project at The REALM System Kickstarter here