So in order for me to safely use these new features in my app, EITHER my customers have to have manually selected some non-urgent items from Windows Update OR I have to force those same updates onto the customers behind their backs. Yeah, I can see that happening. (The latter option would require MS to make the updates available as a download, which as far as I see they haven't done, and contravenes good practice, local laws at my customer site and almost certainly some licence terms attached to the actual updates, so I'm really only mentioning it out of completeness.)
Look, Mr Ballmer, get real. Either this stuff is robust enough that *you* are willing to force it (in *your* name) on all users as part of a service pack, or I can't afford the customer support burden of making my software depend on it.