Some sort of external light is always needed. I'm hoping that the sensor becomes practical, but, there are always shadows, particularly around the eyes that need external light no matter how sensitive a sensor you have. Some sort of light will be needed, and flash already is a mature technology.
I'm also wondering about the property that he quoters of holding light far longer. Actually, we want sensors that will reset more quickly so that we get more frames per second.
For use in a telescope, it might not be a issue, but for video, it could be a issue.
High sensitivity might make foveon type sensors a bit more practical, but Bayer sensors will still be more sensitive with any given sensor material.
The sensor is basically Graphite (Carbon). What ever happened to the Black Silicone they were hyping 10 years ago