Imagine being able to make a machine do your bidding with your thoughts alone, no button pressing, typing, screen tapping or fumbling with remote controls, just brain power. Well, this sci-fi scenario ...

With one tap on his space bar, Andrea Stocco fires the cannon on his computer game and blows a rocket out of the sky. The game itself is unremarkable - in fact it looks like a relic of the 1980s. What ...