There has been tremendous advance in computing power and computer technology but not a lot has changed with the way we interact with the computing devices. Lots of companies have created Natural User Interfaces and tried to make our interactions with the computer seamless. I have played with 3D mice and haptic devices like Phantom. But, none of them have really replaced the mouse.
Recently, LEAP Motion introduced a new device called Leap. Leap is like Kinect but in a much smaller scale. Microsoft has plans of bringing Kinect interface to the laptop, but LEAP Motion beat them to it. This is very exciting technology and based on the claims Leap is going to be very sensitive and able to capture minute gestures. This is a breakthrough in natural user interfaces in many areas.
I have used 3D mice in the past and they are good for controlling a cursor in 3D (duh), but can be clumsy. They are great for traversing 3D spaces and for CAD modeling, but do not provide any haptic feedback. What I like about the Phantom is the haptic feedback, which is invaluable when you are modeling art in 3D or when you are simulating a surgery. Phantom simulates a pen in a 3D space. The only dis-advantage of the Phantom is that it just simulates one point in space. This is where Kinetc/Leap comes in. It can detect multiple input points and hence can detect your whole hand and all its fingers. What is lacking, though is the haptic feedback.
Imagine building a clay sculpture on your computer. You can do it with Leap using your hands just the way you would in real life. I have done it with Phantom, but it is not natural. You don't use a pen to sculpt in clay. You do use some tools, but most of the modeling is done with bare hands. But, Phantom does offer awesome feedback.
Wii controllers provided some tactile feedback (vibration) whereas Kinect [controller] provides none. I have played with both the controllers and since the feedback from Wii is not realistic, I don't miss it in the Kinect at all. So, we will get used to natural user interfaces which provide no tactile feedback and Kinect/Leap may become second nature.
Leap is exciting technology with unlimited uses in a variety of areas. I have already pre-ordered (at $60, it is a no brainer) the Leap and cannot wait to get my hands on it.