Trouble reading on your iPhone without walking into things? E-book app MegaReader may have you covered. It’s just added a “heads up display” feature, which uses the camera on camera-equipped iPhones (and presumably the iPod Touch 4; earlier Touch owners would be out of luck) to superimpose the text of what you’re reading over a view of what’s in front of you.
Whether or not the feature would be useful in “real life” (would being able to see a view through the camera while reading really keep you from running into things?), it does provide an excuse for a hilarious promotional video.
(Found via Engadget.)