Imagine surgeons who can't touch a surface with his/her hands due to hygiene concerns using it to manipulate various images/scans of the patient on the table in front of him/her.
Well yes. If multiple solutions gain traction, it just proves that there is a market for this kind of thing. It's not about being first, it's about executing well. If Leap is more accurate for tracking movement, it could prove more suitable than the kinect.