As usual, we are not recommending that anyone install this DAY ONE release on a critical computer or use for any critical job.
We have been working with the beta version up until now and are not prepared to advocate the release yet for prime time. We begin testing the new release starting today and will post our findings and recommendations soon.
But yes, there are some nice new features in there. The dust brush seems to work great, being able to have a small floating focus check window again is nice - especially being able to have multiple focus check windows, etc, etc.
It's good stuff, but be careful.