I read an article a while back when they were just testing this tech. It said the camera takes a picture at the full ~40MP res and then algorithmically chooses

I read an article a while back when they were just testing this tech. It said the camera takes a picture at the full ~40MP res and then algorithmically chooses the best pixels and sizes down the image to a more reasonable 8MP. Apparently this has a huge benefit on low light shooting.