You get the effect you want already, there's been a number of "official Google phones": the G1, the Nexus One, the Nexus S, and soon the Galaxy Nexus. These are Google-only, no-crapware phones, designed to showcase the newest Android offerings in the best light.
With iOS, there's only the one blessed option. You get one new phone a year. If it's a feature-bump like the 3GS or 4S, then that's what you get.
With Android, you not only get the Google-branded Official Phones, but you also get an entire ecosystem of devices to suit any taste. Want a hardware keyboard? You got it. 4.5-inch screens too big for you? Not a problem, plenty of options.
Plenty of problems. Apps never look quite right, because there are too many different resolutions, and maybe or maybe not have this or that button. With engineering resources split over so many products and conpanies, you don't get the best designers and the best hardware people working together on the same device. With all these "enhancements" from the OEMs, upgrading the foundation is more expensive to port and takes longer.
As a side note, I'm convinced that one of the reasons WP7 is not gaining any traction is because it doesn't have the "one phone." They don't have a halo product that draws attention to the OS.
You get the effect you want already, there's been a number of "official Google phones": the G1, the Nexus One, the Nexus S, and soon the Galaxy Nexus. These are Google-only, no-crapware phones, designed to showcase the newest Android offerings in the best light.
With iOS, there's only the one blessed option. You get one new phone a year. If it's a feature-bump like the 3GS or 4S, then that's what you get.
With Android, you not only get the Google-branded Official Phones, but you also get an entire ecosystem of devices to suit any taste. Want a hardware keyboard? You got it. 4.5-inch screens too big for you? Not a problem, plenty of options.