The way I understand it, it’s specifically not to gain more speed, but completely focused on aesthetics. Themes, background, and other touches to make it look pretty, and perhaps some UX aspects too.

It’s nice, and good to see more of a push. However, I think kill switches for at least microphone and camera should be the new default. It’s absolutely ridiculous to walk around with an internet connected mic and a camera that looks at your face whenever you look at your phone. Personally, I’ll never carry a phone around anymore that doesn’t have mics and cameras desoldered or there’s a kill switch. For the back camera a cover with a slide is fine, but doesn’t really work with the front part.