Brandon has a new novella, Perfect State, and it will be coming on March 31st, according to this Amazon page. And look at that cover! Team Sanderson is knocking it out of the park with these covers. (See the high resolution cover here!)
Never heard of Perfect State? Yeah, no one did until the Firefight tour, where he read part of it. It's like the Matrix, but "happier". It's an interesting mix of fantasy in the "Matrix," and presumably some sci-fi out of it.
The description is as follows: