Good video, very much worth watching despite the length. New UI will look something like this:
with an option for a more classic look.
Looks like an enourmous UX improvement too, and a rewrite to QT and eliminating a lot of technical debt will make development faster.
He made a comment in the video that people have been running versions of audacity that have not been updated in 10 years. I went and had a look at the version I had installed. Yep.
I actually assumed it did have an auto update feature and they're just wasn't any updates.