We know that the Nexus 5 should arrive with an 8-megapixel rear-facing camera, with most - myself included - not too impressed with that. But, now there's news that Google's upcoming flagship pure Android device might feature a camera technology called MEMS.
MEMS stands for microelectromechanical technology, and is a technology that is very different from the usual voice coil motors (VCMs) found in today's smartphone cameras. It's the same technology found in microphones, gyros and barometers in our smartphones today. It's very precise, with MEMS made in clean rooms just like other chips, but hundreds of times more power efficient.
MEMS is capable of focusing 7 times faster than current cameras, and is able to snap images very, very fast. The ability of snapping multiple photos in quick succession allows you to shoot first, and focus later, like you would on a Lytro camera. It doesn't matter if you're taking photos in daylight or at night, as a MEMS-based camera can focus in a fraction of a second, and is magnitudes faster than current cameras. It is rumored that the Nexus 5 would see this technology baked inside of it, the first of its kind.