I have read the announcement of "Moving to OpenJDK as the official Java SE 7 Reference". I know that Sun Java will now be OpenJDK + extra proprietary bits, however I am unsure of how this will translate to benefits (or disadvantages) and I don't want to over-state what this will mean.
What I am thinking is "So What? Is this something to be excited about (as a fan of OpenJDK)?" However more focused questions I have include:
Will the change yield better application compatibility?
What other significant things will result from this change?
How much of a change is it from Java 6?