New Facebook Updates

A bunch of system wide updates occurred today.  The biggest, and most obvious change is in the site's graphics.  The friend lists are larger, and have a nice text overlay.  Taking a page from Google's book, Facebook's coding is simple, yet under the hood, extremely complex.  I'm personally not a fan of the design on my large displays, but on smart phones, and iOS and Droid phones reap all the reward.  I wonder what main platform or device(s) they could be gearing their anticipated audience to be viewing their pages toward?  Hmmm?