Given that we're a planned 3-4 months away from caissons here, and I think this tower is deserving, I thought it was time for its own thread.
As I'm just beginning to see some new renderings with a bit of a different design (have seen at least one other - night time rendering - as well, within the last week), I think it's possible (no inside knowledge here to confirm this) we may just be looking at a little VE-inspired redesign here: link below. The original did have curved glass I believe, which as I understand is pretty expensive. That said, if this is indeed the new design, I like it (obviously need to see more, and more detailed renderings) on its own merits.....
http://www.tjbc.com/current-projects/151-north-franklin
old rendering: