I noticed this feature. But really meta description serves the same purpose. It's nothing ground breaking really. Relevance of serps and delivery speed is ultimately what is important.
I don't know what it is but bings a great search engine but googles better. There's something about google which everyone loves and makes them prefer it!
the only thing I have used Bing for is to check to see if my sites are ranking there, still go to google when I am actually searching for anything getting some traffic from Bing already though, so that is cool (maybe I should have said that is cuil )
It is the first decent competitor to google I have seen. Finally Microsoft may have made a web service that doesnt suck - they have been trying for long enough....
Many are switching to Bing cos as what i have observed here. Bing brings good traffic to their site. They are all useful actually. We can use each of them as an alternative Search Engines.
I have noticed that many people are admiring how Bing works for there site. that's a big plus for Bing.
Remember its still Beta ! I really like it so far and Don't see why it cant compete with google. The image search is quite good aswell.
Its just a start and maybe in the near future, people or even I will binging it instead of gooogling it