So basically, the Java strategy. Killing the alternatives through creating compatibility uncertainty. Oh, man. This doesn't bode well.
I hope this drives developers towards using and improving Postgres, but, well, who knows. One can dream!
More likely is that it may drive people towards Percona, which I have on good word is a solid professional MySQL branch...or, like Java, people will just stick with the brand. :/
EDIT: adding links for the curious.
Percona: http://www.percona.com/
Background on the Java stuff: http://arstechnica.com/information-technology/2010/12/apache... (the difference is that MySQL never did have open governance, so there was nobody to quit in a justified huff)