Not yet officially released, or at least officially announced.
Looks like a new version of Retrologue, and MediaBay content icons: Instruments, Loops & Samples, and More (Track Presets, VST FX Presets, FX Chain Presets, Strip Presets, and Pattern Banks.
The Hub isn’t working at the moment: no news or video tutorials.
Perhaps my imagination, but the graphics look sharper.
The installation on my Mac Mini did not overwrite C8.