Stack Exchange just debuted new user profile pages, and they're pretty great.
Are they coming to RPG.se? When?
They are coming to all of SE, including RPG.se.
These updates depend on the rollout of a new CSS framework. We are apparently set up with that new framework (as evidenced by a recent bug in it that showed up here briefly), so it's just a matter of time before we also get the new pages code rollout.
(I'm anxious for them too! They are pretty great.)
As of November 2015, they are imminent!