Dan Frommer:

One opportunity would be to formally split Android devices into three tracks: Plain-old-Android, do what you want with it; the Nexus program (significant Google control, available to select partners); and a third line (complete Google control, exclusive to Motorola, ideally the highest-quality line). We’ll see if that happens — and if it does, whether it works. Everyone has different motivations for Android: Google, phone manufacturers, carriers, and consumers. They might never harmonize.

I think the third is where Google will eventually have to end up, but once that happens why would any other Android phone manufacturer (Samsung, HTC) bother making Android powered phones?