I can also see PostGreSQL fanbois salivating at the possible demise of MySQL. :-/
I don't necessarily think so. I'll admit to being a fan of Postgres -- it's what I use, and it's what this website runs on (and has for eons.) But I think that competition in the FOSS database market is a good thing for all and sundry.
If this ends up meaning that Postgres is installed as a readily-available option in more hosting centers, that would be a good thing, however. Too many places offer only MySQL (since it's a part of LAMP.)