The article linked is incredibly vague and seems to presuppose that the trajectory of all open-source projects is up, up, up. While this is possible -- if Google puts the resources into constant improvement, Android certainly will improve -- it presupposes that Apple is going to be standing still. Not so. Apple's iPhone platform is now a moving target, and the year to two-year market advantage is going to be difficult for Android to top.
Google, as much as I love some of their products, has shown themselves to be a bit spotty with support and improvements to many of their initiatives. Everyone understands that mobile is a big deal, but if Google's decides that they can dominate search just as much on the iPhone than on their own platform, it's possible their drive to improve Android will wither.
The fact that the platform is open-source means virtually nothing to consumers, by the way. They simply want to make calls, surf the web and play games.