Quote from Mark Reinhold on Devoxx: "Oracle will no longer be investing in Swing". Instead the real work will go into JavaFX.
My interpretation: Oracle seems hell bent on forcing their Flash alternative on us. For that they're willing to sacrifice one of the best parts of the Java standard libraries. So far JavaFX has been a dud, and my suggestion would be to switch to SWT instead for developping desktop apps.
[UPDATE] Other valid Swing alternative: Apache Pivot.