People who are complaining aren't seeing the the point. You WONT be using this EVERY SINGLE MOMENT. You apply simple gestures to the UI that give you quick commands you need. Nothing precise, simple. Then you keep using your mouse and keyboard combo and apply leap for something that needs a gesture and feels more natural.
There are certain things that a mouse and keyboard will always do but there are other that can fee more natural.
Came here to post this.
It's a supplement to a keyboard and mouse. Not everyone keeps their arms resting on the table or desk when at a computer. When you want to scroll through something with the flick of a wrist, the Leap will let you do that.
If you want.
I think this technology will be more practical in the future than touchscreens on laptop or desktop screens.