Die einfachen Ideen sind die besten: Bei Boing Boing bin ich auf diese iPhone App namens Type n Walk gestoßen:
Type n Walk is a new iPhone app that lets you see what’s in front of you while typing and walking.
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Type n Walk displays a transparent viewport of what’s directly in front of you. This combined with your peripheral vision is just enough visual information to help you avoid obstacles — like walking face-first into a tree!
Video (1 min.):