Wrong, current image sensors have around ~50% quantum efficiency nowadays. [1] That's 1 f-stop from the theoretical maximum, while they're pushing around 10 f-stops above the top-of-the-line mobile phone cam / security cam.
The pace of technology is still limited by physics - if they take out the 2kW monster flash then the lens size needs to be increased to a diameter of several meters, just to maintain the same performance at a distance of 1 meter (!).