Half a croissant, on a plate, with a sign in front of it saying '50c'
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This would work fine, except in terms of success.

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Fingerprint touch screen

A Touch Screen With the Capability to recognise fingerprints
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Imagine a screen that could tell the difference between the fingers you use to touch a screen.

You could do different stuff with each finger (drawing, left-click, right-click, selecting text).
If a friend touches you screen it would draw in a different color, or not work at all, thereby rendering all passwords useless, as when you touch you fingerprint is instantly recognized.
A laptop would be just a screen, no moving parts, just the touch screen.

We would have a fresh new look computer, and awesome computer games, and a total new user interface.
IceFest, Nov 24 2007

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       What if you cut your finger? And do the ends of my thumbs have a recognizable fingerprint?
MisterQED, Nov 24 2007
  

       We have 10 fingers, if one gets cut the database gets corrected, police can use parts of fingerprints so it should work .
IceFest, Nov 24 2007
  

       I don't belive so. Still, the idea is good. And, with a really good processor, it might work. Granted, it would have some lag, but that can be fixed in the next few years.
Shadow Phoenix, Nov 24 2007
  

       Seven years later, this might actually be happening....
IceFest, Mar 01 2014
  
      
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