This trailer shows a the website project created by Andreas Lutz as part of a study project and is rather inspirational. The website uses video and sound input to control the navigation, so basically you navigate using gestures and voice.
Make sure you try it out for yourself on Andreas’ website as well. I found it still pretty hard to use the navigation and have to admit I still prefer clicking for now :) but you can see where this is going and that’s an opportunity that I do want to think about. Very cool!