While it’s hard to say exactly what Apple will announce, I suspect the first Mac to feature one of Apple’s custom-designed ARM-based chips will be a thin-and-light laptop similar to the MacBook Air or MacBook Pro 13—though I wouldn’t be surprised to see a new Mac Mini or iMac with an ARM-based chip get announced as well.
Aside from new Macs, it’s possible Apple’s November event could shed light on Apple’s AirTags, which many have been expecting to be announced sometime this year.