I dunno how many times this invention has been announced in various forms, but given today's running topic, the mind-controlled computer interface deserves a nod. A US/Australian company showed off a headset at the Consumer Electronics Show (CES) that lets you control a computer game with your thoughts:
http://news.bbc.co.uk/2/hi/technology/7254078.stm (includes link to video demo)
If it works (the demo is not terribly impressive), then it would fundamentally change the way people use computers. No more carpal tunnel syndrome, for one thing. With computers in all of our everyday objects, we could control the world with our thoughts.
Competitive gamers would be the first to devolve into even more slothful beings. The skill set required by gamers today involves fine motor control and quick reactions, along with higher-level reasoning about game mechanics. But if you don't have to mouse and hit buttons with precision, today's champion gamers may lose their advantage to those who can merely sit there and think faster. A brain in a jar could totally pwn you in Halo. It follows logically that the same brain would decimate your third-world country's army using a small squad of remote-controlled robots.
Stupidity won't be the new intelligence if this comes to pass. You will gain great advantage from quick thinking. Physical laziness, however, would be the rule. And in that respect, we Americans are world leaders. I, for one, welcome our new fatass telekinetic overlords.