Here’s some crazy photo-editing on steroids leveraging stock 3d models. From the 3d side of the fence this might not seem that much hoopla to start with, but this approach seems to transform any still 2d photo into a mini 3d environment in which you can start moving and rotating the objects as long as you can match them with a 3d model which is not that hard. Now bring this back to our realm and since we have it all in 3d anyway, this opens some crazy options for post render manipulations!
Short Intro Video
Full Length Video
Visit this project page at 3D Object Manipulation in a Single Photograph using Stock 3D Models and if you really want to geek out, you also have the PDF paper describing this approach along with some source code
Also check out the comments thread on Hacker News where I originally found out about this cool project.