Sifting through the release notes, a few things stand out to me. Since I'm easily annoyed by slow windowing operations (resize, move, etc.), I like the fact that the team has been doing work in that area to enable flicker-free resizing. They also updated the USB stack to Poseidon 4.2.
There are also a number of new features which seem to be coming from the work done on the MorphOS port to the Mac Mini (the G4 one, obviously). Read-only support for HFS+ formatted volumes has been added, and a utility called SHIFTCLICK has been added, which is described as a "Helper for Mac users with single-button mice". In other words, hold shift and click to get a right click. Come to think of it - iBooks and PowerBooks, anyone?
By the way, I'm happy to say that very soon, you'll be seeing a review of MorphOS here on OSNews, thanks to a very generous OSNews reader who has offered to loan me his Efika machine with MorphOS installed. Stay tuned!