Controller evolution, game console style.

Top to bottom:

Original Xbox Controller S, Kinect

Nintendo Virtual Boy, Wiimote

Original Sony PlayStation controller, PlayStation Move.

We love that the world is at the point where we're not upgrading our computers as often. Instead, we're upgrading sensors so the computer understands more about us.

Adding Kinect to an Xbox is like adding sonar to a submarine—sure, you could drive it around before, but now it can see where it's going. OK, that's a rather stretched analogy. You get the idea.