Updates During The LTS Cycle - With Ubuntu 12.04 LTS being supported on the desktop now for five years, Canonical is more worried about enabling new hardware support after the April release. What the plan is now is to backport new kernels and the X/Mesa stack to 12.04. In the Ubuntu X world, what they are looking at doing is simply rebuilding the latest Mesa/X packages of new Ubuntu releases and drop that into the Precise repository in time for the LTS point releases. In other words, the stack of Ubuntu 12.10 would be rebuilt and dropped into the 12.04 repository, 13.04 packages would be rebuilt and pushed back into 12.04, etc.