I feel like most things targetting the bleeding edge features of .NET are mostly for internal use by various companies of various sizes.

You don't see too much coming out for the commercial software sector because most commercial software is still trying to support older operating systems, or cross platform applications, which means .NET is totally out of the picture (for the latter case). Many commercial apps are still native code (C++ mostly) if for no better reason than it can be easily ported to the mac now that they run on intel processors.

I dont have to worry about macs, but I do sell commercial software, and most of my customers are the kinds of people who do not invest heavily in computers. So that means upwards of 25% of my customer base is using Windows 98. Sure the majority are running XP now at least, but I still have to support 98, ME, and 2000, which means I can't use anything above .NET 2.0