Those are minor version updates, not much different than the PR1.0, PR1.1, and forthcoming PR1.2 updates for the N900.
The Droid came with 2.0 didn't it? Again, a minor update to 2.1 is predicted.
I still get new apps for my N800. This has nothing to do with support by Nokia/Google though - it's down to the developers.
I'm quite willing to admit that Nokia are failing to make the commitment they ought to for longer term support (whether they fail to offer the support will only be seen in time though). To claim that all their competitors are far superior in this matter is way off mark though.