From previously posted in journal of elementary site, they are experimenting with the new gtk3 feature of typography
The font Raleway was chosen for the title font to provide a more clean and crisp looking interface
This feature was previously available only for testing from their testing bzr, and the outcome was amazing, a sleek yet minimal look window
(Ubuntu should take advantage of this to sexified their UI as well)
From the recent update, looks like it has hit elementary daily ppa and here is the result
The new typography will only show up on elementary apps, however, Marlin are still with the same old look
Might be a bug
Nevertheless, well done elementary ! Things are getting sexier day by day
