Some of you may remember the film Minority Report. It was based on a story by the science fiction writer Phillip K Dick. I thought it an excellent film. A few of the scenes involved the character played by Tom Cruise using hand gestures to control a computer. This idea is now coming alive. Microsoft has developed an interface based on their Kinect technology. MIT researchers have already worked on this problem earlier, so it may be coming to a computer near you soon. My suspicion is that it may surface in the future first with tablet technology, where a mouse tends not to be used and where users touch a screen. I find using hand contact a little awkward so this could be the answer.