True, but pro athletes have already had other proprietary technology for the past year. Oculus might not even be the best solution currently for athletic performance. A cool read on Stanford Football's use of Virtual Reality in practice settings [0]
VR is the real thing. You still throw the football. You just get to see exactly what you did, and how it compares with the throws before and after. And you can get things like realtime audio feedback while you move to give you information about where your body is relative to where you're trying to train to. The possibilities are infinite.