Problem is, they still have the right patents and the right attitude to kill forks, and as other pointed out it is debatable if the patents grant applies to derivates of OpenJDK.
What the world needs to do is to start from scratch, with a new VM, new specs, a new base class library, plus a compiler that converts Java bytecode to this new VM ... something like .NET / Android, but more cross-platform and less tied to Java's standard library.