The ubiquitous mouse (and touchpads and wheels) will be around or a very long time. It takes a long time or people to use and get used to new technology. I've long been a proponent of eyeglass-type of displays, especially for the workplace as a clerk with a pair of VGA eyeglasses could do his/her work with good posture reducing back strain, et. al. (Here is a link to Thad Starner's website http://www.cc.gatech.edu/~thad/). In general, when people are comortable with something they resist change. While some of us techies might love this stuf, most people will resist using it, period. I'd love to be able to be able to move the mouse by means other than removing my hand rom the keyboard. So, I welcome the changes, but it will emerge very slowly.
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