Here's a great idea for SCUBA divers: a mask with a tiny LCD panel that shows your depth, time you've been under the water and cylinder pressure. The transmitter gathers the data at the regulator and sends it to this mini display mounted right where you need it.
Sometimes if you're diving really deep it might be too dark or murky to see those vital statistics. It's probably just as useful as the excellent head-up display (HUD) on the Corvette, and if the concept works well enough at 180mph, it'll certainly suffice while loitering a few hundred feet under the sea, not far from Davy Jones Locker. Take it with you on your trip to the Bahamas this winter.