Click on an icon? Give me functionality, not flash. What has been shown is all flash on what we already have. I'm rather tired of the same thing in new clothes. Clicking on a icon takes all of half a second and performs the same function. It might not be as fancy on placing the camera on the surface, but it performs the same exact function in maybe all of five seconds more time.
It's not just about "fancy." Knowing the exact location of the camera and let the user to deal with it directly does improve usability. And that's the main point of Surface. Using icon is not as intuitive, and some people may have difficulties finding the location of a new icon. Not to mention if an user connects two or more cameras at once.
This is actually similar to the "minimize animation" in Windows. Some people may think it's just a fancy animation, but it serves a purpose as letting the user know where the minimized window goes in the taskbar.