14
JavaFX 2.0 is now a library. The implementations are platform specific because, amongst others, of the use of hardware accelerated graphics. There's a version for Windows (that uses DirectX) and a developer preview for Linux and Mac (which uses OpenGL) : oracle
Because of the heavy use of hardware acceleration, I guess if there will be an android version (very likely), the target will be relatively new tables, rather then all android devices.