I live-streamed Apple's presentation on September 12th, and in the first hour and 50 minutes of the presentation, there was no mention of a Mac or macOS. It was all about the Apple Watch and iPhones. In the last 5 minutes Tim Cook briefly mentioned the Home Pod and macOS Mojave. Then Tim thanked me for watching...😊...
To possibly summarize what I saw: lots of health and exercise apps, gaming apps, design improvements, advanced technology, and pretty looks. They mentioned that a prior chip performed 600 million operations per second (Wow!), and the new one 6 trillion operations per second. Unbelievable.
If you weren't able to watch the conference, I'm sure you'll still be able to watch it, should you have an interest. I enjoyed parts of it, and some not so much. I'm not into gaming, for example. But, lots of new stuff on the watch and iPhone.