Here are a few videos showing the new Canon Rebel T4i/650D’s touchscreen LCD in action. The navigation options (e.g. pinch to zoom and swipe to change) are very similar to controls found on smartphones.
Gizmodo suggests that many of the new features (e.g. touchscreen interface and continual autofocus Live View) could be a foreshadowing of what we’ll soon see in Canon’s rumored mirrorless camera.