Well, to be perfectly honest its also not the game-performance advantage that drives me so enthusiastic about this feature.
Basically I want to see big swing apps like JBuilder or Netbeans even more fly on Linux but with the nice effect that my Java2D games also perform better...
I was a bit sad when I saw how the OGL pipeline performed in 1.5, STR made it much better but there are areas where X11 is still the clear winner withought any technical reason (since x11 has context-switch+protocoll overhead).
However one bug ist still open and is even worse with STR: Every java-application causes 1500 context-switches/s, and since the java2d-team sis not know how to fix it they marked it as "not a bug" and closed it.
If it can't be solved why does my system with a lot of native GUI apps can have only 500CS/s, whereas 5 running java apps cause 6-7000 (!!) context switches. This also really affects scheduler/system performance!
However, nothing is perfect :-(