Why did Apple include dedicated a neural network "processor" in standard consumer products?
Having a powerful machine learning chip in your device allows you to do things that you probably have not thought of. Things like improving the images that your camera is taking. Cutting out the background and replacing it with a boring beige background, very valuable if you are in a video conference and want to show your face to people but not your home.
Or a nice one: Most people in a video conference look at the screen, not at the camera, so when their image is transmitted, it seems that you can't look in the other persons eyes. Very nice if you have an ML chip how can change the image as if you were looking straight into the camera, without taxing your battery.
Something not done (yet) would be improving sound quality, for example removing background noise and filling in gaps when sound transmission fails, and totally cool would be removing people's accents, so that I can understand someone with a strong Scottish or Indian accent without problems.
You are about in the same situation as someone in the early 1980's asking what the advantages of a graphical user interface would be.