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Well, this will be good for a few novelty apps, and that is it. Especially if there are cameras on both sides.

"Face distorter", you both see distorted fun-house images of the other person. There could be various modes, such as "morning hair", "curlers", "more handsome", etc.

It will be popular to have a "Droid Bar" in your home (or public places), with Droids hanging from the ceiling, where you sit on either side of the bar and surf the web or work on collaborative apps or games.
 
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