Those having glossy screens sure will need an automated screen wiper to go with their new laptops. They've got no touch screens and we take care to not touch them, but eventually the screens get dusted and/or fingerprinted all over.
Look at this iPad. Isn't it disgusting?
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Sure it's not how it looks in ads. It's a real thing in real use.
I also expect a screen wiper in iPad 3, by the way. Screw the liquid metal and gimme the ol' good wiper, please. Or make it matte/Pixel Qi, for heaven's sake.
You sure have some dirty finger .... time to wash your hands - you should do it at least once a week.