The new design promises an improvement, by:
- Improving the load time of the results
- Moving the search results higher up on the page
- Adding the new navigation bar at the top of the page
- Having a more consistent look with the Yahoo homepage
Yahoo also promises to roll out the top bar you see on the home page and on the search results page throughout more and more Yahoo properties going forward.
Here is a video of the new look:
Seems like webmasters are happy with the change.
Forum discussion at WebmasterWorld.