not able to do that just means you need to exercise... try yoga or a good martial arts class... your screen would not be "up in front of you" like they are now. a touch free PC (except the crap HP has been selling for years) would be at about the angle of your KB if you use the built-in legs at the back. between 10 and 25 degrees, not at a 70 - 90 degree angle.
I remember reading somewhere that a company making a tablet pc had put a touch interface on the back of the device that was used like a touch pad, but was the exact size of the screen, and where you touched the back corresponded to the location on the fron that was affected. the device itself sounds like it'll bomb... after all, where are you going to hold it? but there is a way companies are "trying" find an alternate way to interface with your screen instead of putting your hands in front of it...
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