Rather surprised LibGDX didn't do this sooner. One of the niceties of LibGDX was that it was 102% free for all platforms. But then RoboVM closed source and suddenly making an iOS game stopped being free.
(although LibGDX was able to finagle a free license for small developers).
And I wish I could say I'm surprised that Oracle's not jumping in to buy this tech, as it seems like it would be a terrific addition to the Java toolset. But adding innovation to Java is, to say the least, not Oracle's strong suit.