I'm encouraged by all the development and density - certainly better than vacant land - but not nearly as optimistic as you that this area will be "busy." There's barely any ground floor retail planned other than a couple of spots in the Lennar development, Mangum, and Venable Center. The rest is just super blocks of massive apartment complexes, which will lead to a very unfriendly environment for pedestrians. Such a wasted opportunity. I truly feel that a decade or so from now, we're going to look back on this and wonder why no one had the foresight to activate this area and help it connect with the E Main St. corridor across the tracks.
I could be (and hope) I'm wrong in my understanding of plans -- this is just off the top of my head -- but highlighted areas in yellow will have retail from what I recall. And even this is not a given -- 555 Mangum is advertising the ground level as retail OR office space.