I'm not familiar with the "Superflat" movement, but in reply to xoconostle I would say that the real advantage of this technique over 2-D applications is that the models can be completely posed and reposed, with full use of transparency maps, textures, etc. You can't easily do these things in Adobe Illustrator. Imagine if an art director said "can you have the character looking a little more to upwards towards the sky"- In a 2-D application that means several hours re-work, maybe. In this technique its just a few clicks away to having a character posed any way you want, in any hairstyle, clothes, etc. I'm certain that there could be huge value in time-sensitive applications like website advertising and news graphics, among other things. The 2-D look is still very much in demand today, but using 3-D to get there offers huge advantages, I think. (Plus you STILL HAVE all the original advantages of realistic 3D!) Plus, these 2-D images can be ANIMATED and using the video codecs available, output immediately to professional video.