Found something neat just now: [youtube]http://www.youtube.com/watch?v=oWu9TFJjHaM[/youtube] MYO is some kind of armband which can control multiple things. From smartphones, to tablets and even drones (http://www.popsci.com/gadgets/article/2013-02/gesture-control-all-your-gadgets-awesome-wristband) You can get more info here: https://getmyo.com/ and even preorder it. EDIT: I saw a made a mistake with my url, fixed it.
This is pure epicness. However I'd screw up my powerpoint presentation SO much with this. I like to move a lot with my hands/arms while talking. My slides would be all over the place. xD But yeah, cool technology!