Bear in mind that this is a feature update, not a security release, so there is no need to rush to upgrade. Read the notes, and make sure you disable plugins before upgrading. Some plugins and themes may not behave themselves if they rely on databases tables that won’t be there any more. Themes will need to be updated to show tags, if you want to use them.
Expect an update here at the weekend, when I’ll have the time to do it carefully.
If you are upgrading, make sure you have a backup of your database and any files you’ve changed.