If I were Microsoft I would probably like micro-content and metadata. IE and the browser wars were the pits for them. They should hate html by now. Microsoft also hates Google. Google hates metadata. Google likes scraping html, mixing it with their secret sauce and creating the all-mighty page ranking. Anything that detracts value from this rocket science or makes things complicated for Google or easy for other people is probably a bad thing for Google.
If the Net started to look more and more like XML based syndication and subscriptions with lots of links in the feeds to metadata and other namespaces, it would be more and more difficult to create page ranking out of plain old html.
My guess is that Microsoft knows this and intends to be there when it happens instead of totally missing it at the beginning like when the Internet got started. I have a feeling they will embrace a lot of the open standards that we are creating in the blog space now, but that they will add their usual garbage afterwards in the name spaces and metadata so that at the end of the day it all turns funky and Microsoft.
Just a thought...