This device will change the world

Since I was a child I've been designing this device in my head. Every year or two the bug hits and I look at what hardware would be required, and every time it gets theoretically cheaper and easier to build. Someone finally built it.

http://www.looxcie.com/

This is a wearable camcorder that is always recording on a short loop. When you press the record button it starts recording (or uploading, via a smartphone) from 30 seconds in the past.

See something awesome? Press the button.
See an accident? Press the button.
See a crime? Press the button.

I love living in the future.