Personally, I’m more excited about macOS Mojave than any recent
macOS beta. The new dark mode alone is a huge change in what we
have come to think of as the Mac interface, and the changes to
Finder have an awful lot of potential. I’m also really happy to be
able to control my HomeKit devices directly from my Mac, either
via the Home app or Siri.
I’m really excited about the improved Automator support in the Finder. It’s a real “This is what makes the Mac the Mac” feature.