The Microsoft Surface
The Scene At L.A.'s Milk Studios
Cover Story 2
They MS-tery Within
Microsoft's R&D division has been working on the tech inside the keyboards for quite some time.
It's based on a patent MS has held since 2003 and was used in 2010's Sidewinder x4 keyboard for serious gaming.
The sensors are both low power and ultra-thin, and they operate in reaction to force--so they can ignore you resting your hands on the cover. When your fingers start hitting the keys with the effort of typing, the cover's electronics detects the action within 8 milliseconds, assesses how hard you're tapping away to determine your intent to type, then starts sending data on your finger's movements to the tablet. When it's folded away it even turns the sensors off so they consume no power at all.
And it's multitouch, so it doesn't care if you're pushing several fingers onto its matt surface at the same time--which means it can cope with shift or control key presses.