Sarah Gooding for WP Tavern:

The new design for the official WordPress Theme Directory is live today. […] The design is likely already familiar to most users, as it was matched to the UI to the admin themes browser. Now, whether you’re behind the wheel of your WordPress site in the admin, or browsing on the official directory, the experience of searching and sorting themes is more consistent.

A definite improvement over the old design, which was neither good-looking nor responsive. There’s still some work to be done on the responsive end of things, but it’s a solid step in the right direction.