If you perform a search on Bing, you'll see a preview next to the search results, that looks like this;

Search engines are good enough now at indexing content that you can usually find what you're looking for in the first few lines of text. This takes it 10 steps further.
 
As a user I can find most of what I'm looking for without ever visiting the page - cool! As a website or blog owner this sucks! The reason we all work so hard at SEO and quality content is so people will come to our site and buy/comment/participate, etc. - not so you can get everything you need without ever leaving the search page.
 
Google has been toying with greater amount of 'leading' content which essentially has the same effect, but they are trying to find the right balance to avoid syphoning off too much of a site's traffic. Microsoft in this case is doing whatever it can to find an advantage in what seems to be an impossible battle for market-share.
 
As a user, the more data on the results page the better. As someone who relies on search engine traffic for several sites, I think this stinks.