PubMed Labs - a test site for future PubMed features

I was adding PubMed's mobile site to a device today and ran across something interesting. 

I hadn't heard of PubMed Labs before. What is is you ask?

• "PubMed Labs is a test site where we are experimenting with new features and tools that eventually may be incorporated in PubMed, in their current or a revised form based on the input we receive. Please try the site and let us know what you think." 
• Highlights include a new search algorithm, mobile friendly design, and important points from article abstracts.
• Additional features are added monthly.