TL;DR: 1. USB-C. Yay! 2. New colors. Apple repeatedly refers to the colors as "stunning," but they look like regular colors to me. 3. Incremental improvement

TL;DR: 1. USB-C. Yay! 2. New colors. Apple repeatedly refers to the colors as "stunning," but they look like regular colors to me. 3. Incremental improvements. Pretty much what you expect every year.