Think of Revolution to be a code name, like OS X Tiger or OS X Leopard; we're simply trying to make it easier for development to continue on both paths without confusing a whole lot of people with version numbers that are simply way too close together on these very different branches.
So the next one will be 'Renaissance', and the next next Culture Revolution and son on

I like the idea but not sure if I like the name.
Can't wait for the Alpha to come out.