Well Ubuntu will backport it anyway and others can do the same I suppose.
Phoronix: The X Input 2.1 Multi-Touch Implementation Is Here
Canonical's Chase Douglas has corralled Daniel Stone's X Input 2.1 Multi-Touch patches and have readied them for integration into the X.Org Server and related software components...
http://www.phoronix.com/vr.php?view=ODc4NA
Well Ubuntu will backport it anyway and others can do the same I suppose.