Remember those people talking animatedly to themselves in public who
you used to give a wide berth to before you realized that they weren't
crazy, just the first users of a new Bluetooth technology with wireless
devices tucked behind their ears?
Well, get ready for the next
wave of people acting strange publicly, gesturing and waving their
fingers in your face, with colorful rings around their thumbs. Because
they're coming, and those rings are the newest addition to the "internet
of things" — wearable technology that promises to change the world. The
rings, called Fins, make your entire palm a gesture interface with
which you can control multiple connected devices.