I think Google is quite pleased with the way Android has turned out. I don't think they'll crack down at all nor make the user experience dramatically better.

They're making money hand over fist in ad revenue from Android. They're in the ad business. Android is a vehicle to pushing ads to people and it does it as well as it possibly could.

Microsoft is in the software business. They have to deploy something that works and looks half decent as they're actually charging money for it.