So this update is only useful for realms users, as it includes performance upgrades. There are a few bug fixes for singleplayer, but nobody has really noticed these bugs anyway.
Johan has submitted it to the App Store, and we can expect around Monday-Wednesday for iOS users. If you use Android, it’s available already.
I would recommend not updating to this version, as there are already noticeable bugs. reddit.com/r/MCPE/comments/1o8gct/076_is_out_on_google_play/