Agreed, but I don't foresee any of this changing unless Android's source transitions from open to closed. That's the only way the Android platform would get the tight control iOS has. The Nexus project only does so much when there's only a handful of these devices up against the dozens upon dozens of Android devices from HTC, Samsung, LG, ZTE, Huawei, etc. out in the wild - all running on a wide array of different hardware configurations. And this happens because open source LETS it.
On the flip side, open source is part of what makes the Android platform great. If you're adventurous, you can make an Android device do a lot of things iOS devices can't.
But with that being said, I don't think that Android will suffer the same fate as Blackberry did. Blackberry's demise can be attributed to RIM's inability to change with the times. Their OS is dated and as a platform, it only remains truly relevant to enterprise business users that rely on Blackberry's robust email services.