Ars Technica:

Apple will release the final version of macOS 10.12 Sierra to the public on September 20th. The company made the announcement on its web site during its September product event today.

Aside from being called “macOS” now, Sierra brings a handful of big new features and a longer list of minor tweaks. We covered most of that ground in our preview of the developer build of the software but the short list includes Siri, proximity-based Apple Watch unlocking, Apple Pay on the web, and more.

For a guy like me who sits in front of a computer all day, every day, this is a bigger and more interesting deal to me than the new hardware announced today.