Nob vs Leap: Next Generation Wearables navigate by simply waving a finger

I am very curious to see how wearables for PC / Mac navigation develops.  In a world where we have very specific uses for touchscreens per device types, the idea of having a wearable or a sensor for general use of a computer seems awkwardly new.  Both Leap and now Nob have been providing the vision of specific natural gestures to enhance how we interact with computers.  I wonder if people will be happy with these technologies purely as entertainment enhancements or if they need a productivity use to rationalize a buy.  Are both these technologies simply an expensive mouse, or do they represent a new generation of hardware peripherals?  Maybe other BYOB setups like Microsoft Smartglass will take off in this space in niche communities like gaming?



What do you think?