Imagine if you could switch your music track while running just by tapping on your hand or your arm. What if your TV and lights knew when you had fallen asleep and automatically turned off. Or if doorknobs were as smart as your current tablet touchscreen and you could send messages to people before they knock. Anything becomes a programmable sensor. This video, presented at the CHI conference going on now in Austin, completely blew me away this morning. You have to watch this!