There’s an interesting free app available for iPhone called i3D. An experiment in face-tracking via the front camera, it shifts the perspective of several demo objects as if you were looking at three dimensional scenes. It’s interesting and fun, but (and even the app’s creator admits this) it still looks flat. The effect doesn’t come close to the what the 3Ds achieves, but it’s still worth checking out.
The funny part comes when you find two of the included demos feature a gaggle of Miis! I can only assume that the app’s creator is a Nintendo fan; he could have used any other images in the world. Perhaps he hasn’t heard that Nintendo counts the Miis among their copyrighted characters.
Sometimes I wonder how closely Apple really screens their app store submissions.