Okay, this isn't going to be easy, but a developer has posted a video on YouTube showing how it's possible to use an Android handset, a projector, a Kinect and a computer to create the future. In your living room. Now.
My desk is boring. My walls are boring. My windows are boring. I need to liven them up by turning them into musical instruments that detect and recognise my touch. Fortunately, that's cheaper and easier than it sounds.