I think having the touchscreen feature on a desktop is a "nice to have" because it does provide fast action by the user when needed. However, advertising touchscreen feature as a full replacement for mice and keyboard on a desktop is simply ridiculous in my opinion.
I agree, Cryptoman. This is what I commented on in a previous post. There are starting to be more touch-screen desktop computers made available, but I don't see the sence in a touch-screen for a desktop. Perhaps it is more for marketing, saying that one computer has more features than a competitor.
İ am trying to think whether a good touchscreen wold ever replace my trusted trackball mouse İ use everyday for work. Given the difference in the ergonomics of the two technologies, İ feel that a mouse is way better if you work for long hours. İmagine how difficult it would be to tap onto a desktop touchscreen for an hour with your elbow raised from the table. You can easily test this for yourself. İf you use a touchscreen device placed on your lap, that will probably feel comfortable enough to work as İ am doing now on my tablet. However, İ must add that even with the tablet on my lap, İ feel the need to support my elbows with two cushions on the sofa as İ am typing. There is also the reliability issue with touchscreens. With some touchscreens what you click is not what you get as the software running in the background may sometimes misinterpret your commands. However, with a mouse if you know what you are doing, you get the job done with 100% accuracy. İ think İ will keep my trusted trackball a while longer on my desktop but will keep on following the developments in gesture interfaces.
Touch screens have already begun being integrated with laptop and desktop computers. However, in my opinion I'm not sure there is much use for them on desktop computers as it would be tiring holding up your arm to the monitor to use your computer rather than have it resting on a desk using a keyboard and mouse.
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