Microsoft updating and rebranding the Windows Marketplace
Play Store. There will be a redesigned Spotlight section, as you can see on the right. Search will be getting a boost to be smarter about finding what you want if you've made a typo, as well as finding related apps even if your search term isn't in the title of the app.
The Top Free and Top Paid sections will be renamed "New+Rising" in an effort to differentiate wording from competitor offerings, and there will be a new "Best Rated" section to promote quality apps. Additionally, "racy" apps are becoming less visible in order to make a "friendlier store", so you may have to dig more if you want the "sexy" apps.
The blog post doesn't say when the changes will roll out, but it seems reasonable to expect it in time for the Windows 8 launch next month.
source: Windows Phone Blog