For most Phoronix readers out there that are Linux enthusiasts into hardware tweaking, performance optimizations, and getting the most out of your Linux box, Mesa 9.0.2 is rather boring. It's just the usual bug-fixing and stable changes that were back-ported from Git master. Most of you reading Phoronix are likely already on Mesa 9.1-devel from Mesa Git master, which is where the exciting work happens.
Mesa 9.1 should be officially released in February and features many changes from improved hardware support, better OpenGL 3.x extension coverage, some performance optimizations, Radeon MSAA happenings, Gallium3D enhancements, improved HyperZ support in Radeon, OpenGL ES 3.0 enablement, and much more.
For those living in the stable Mesa 9.0 land, the Mesa 9.0.2 release announcement can be found on mesa-announce.