New Z elevation feature! Plus new template, performance improvements and more.
I've used all the included performance tests and some of my own. Using a mid-range PC, there is no noticeable difference in performance.
Since I'm mainly developing for desktops, I'd consider this feature to be a nice-to-have in the future. I'm not sure how low-end mobile systems would perform but I guess the performance gains would be minimal at best.
Thanks for the responses!