Regarding the leap...while it has not had as much adoption as the team had hoped, the effort being put into it is still significant. The latest SDK update addresses a number of shortcomings that the initial implementation had, making the hardware that much more viable.

That all said, the biggest issue with all of these new interactions is the lack of a solid, low fail interaction model that can seamlessly replace our current interfaces.

Looking at the leap, while it does a number of things right it has to always get it right, or as close to always as possible to be as good as a mouse click or a keyboard key press.

This looks interesting, but watching a promotional video doesn't show me how often a person has to flick their hand or swipe the touch strip to get the desired result. I have a leap and while I've gotten fairly proficient with it, I still find it's failure rate to be to high to make it a real replacement for my mouse and keyboard.

The problem with Leap is that to do anything remotely accurately for a moderate period of time takes an huge amount of effort moving your arm in mid-air with only visual feedback. It will be marginally worse than using a wii controller to type on a screen keyboard, as that includes tactile vibration feedback as you hover over keyboard letters. In the video it struggled at typing a single word on a keyboard.

The device looks great for toy/demo cases like google earth and fruit ninja. There aren't many normal use cases where you would need slow, low accuracy pointing or gestures from a distance that isn't already covered by wii, kinect or a laser pointer for example.

Remote control is already solved by remote controls with buttons and smartphones connected to a tv. The tactile feedback increases the speed of usage so much that no touchless device will ever surpass.

you can address every pixel on the screen you are interacting with. You can also use it for natural "3D gestures" like swipe right/left etc