The new features, like the driver re-work for PRIME DRI2 offloading and the nuking of XAA and new GLX support, is detailed in X.Org Server 1.13 RC1 Packs In Many Changes.
The final release of X.Org Server 1.13 is expected in early September prior to this year's X.Org conference from the SUSE office in Nürnberg.
Below is the mailing list announcement for this latest X.Org Server 1.13 development version. There's just about two dozen changes (bug-fixes) since the previous release candidate.
With this, the 1.13 non-critical bug window is closed. Further patches need to have convincing arguments about how 'critical' they are to be included in 1.13.Perhaps Phoronix should sponsor cookies as well to go with the Phoronix-sponsored beer that should be at the X.Org Developers' Conference next month?
If you don't run this code, and find a bug after 1.13 is final, you'll have to bake cookies for anyone who *did* help test.
Thanks, as always, for everyone's hard work.