There's a feature on the Internet called "search". If you type in "Phil Schiller deep fusion" several pages come up that explain what it is. Try it.
You are an idiot. Phil Schiller said nothing about what it does. Just that it is amazing and will blow your mind. The tech blogs all went on about how it was enhanced night mode, but the presentation said nothing about the level of light in the video. He didn’t really even explain how the picture was better other than more detail, and there was no with / without to give you a sense of what is going on. No comment on how it is used, if it is enabled by default, etc.