Damn! I literally thought of something very much like this yesterday morning! Except my idea was a subcutaneous sensor on the left wrist, and it was going to trigger things like car door locks, kind of like an RFID chip but triggerable, instead of always ready to send its code. No keys needed, just tap twice and *click*, door’s open.

I can’t see how this would be useful during physical activities though, if it’s sensing a sort of seismic motion through the arm. Maybe it’s just me, but when running, I can’t help but think it would be like hitting all the buttons at the same time with each step. At rest, no problem, nothing else is bouncing, but while running? Everything is experiencing G-forces. Might be better off sensing your fingertip and how it’s interacting with the projected buttons. That’s not exactly “new” technology, though.

@Dosbomber: They should be able to filter out shocks that aren’t of the right frequency/intensity for what they’re looking for.

Hmm… The pictures make it look a lot like SixthSense: http://www.pranavmistry.com/projects/sixthsense/
except it uses sound instead of a webcam…
Actualy, this is a lot like an idea i had a few months ago, using a sheet of plastic or cardboard (anything with texture) and using sound to locate the position of your finger on it.

“Just” use your arm!
Yeah right, but don’t forget to mount a godawfullness the size of titanic on you upper arm first.

hello!! some one anseer me im michael

@michael miller from davenport iowa
GO TO EBAY.

MODS! MODS!!!

@PocketBrain
I was thinking full contact Pong. >:D

@mustela
That would be a pretty awesome thing, although backSLIDER says torniquets are a last resort. I’m not sure whether a single bullet would require a “last resort” level of action, but you are right in saying that the military will use this for reactionary systems.