Nokia is still rolling out Qt and they estimate by end of year it will be market of .5 billion phones. So Ovi + Qt is a very real market for at least the next few years. Meanwhile Microsoft transition hasn't even begun.
I'm in Hokkaido in Japan right now and struck by how slow the speed limits are, even in a rural area with wide straight roads. People get used to driving slow when they are forced to, and society benefits from fewer accidents.
Not sure this deserves the excitement of the headline. Amazon's been trolling for mobile developers for months now, and there are many other app stores doing the same.
The question is which ones will get enough traction with consumers to matter.