A full-frame image sensor, like in the 5D Mark II or Nikon D3s, is the equivalent of 35mm. This image sensor is 300mm. This is how well it can see in the dark:
The sensor is on the left compared to a simulation on the right of what the squishy things inside your head can see at 1 lux of illuminance. It's designed mostly for applications in astronomy, but it's not so hard to imagine this kind of physics-cheating sensor in your phone, one day.