I just realized there are only a few prime riverfront properties left in the city that aren't built on... It'll be bittersweet in a way when they are all gone, because there is something so unique and beautiful about the construction of buildings with the barges and constrained conditions that these locations offer.
Off the top of my head, the main spots left are WPS, 400 LSD, the final unused clump at the end of LSE, and that parking lot next to the NBC tower. There are others obviously on the North and South Branches, but those are not as iconic or impressive of locations as far as aesthetics are concerned.
That means there is only one lot left in the river canyon that doesn't have something planned or under construction on it. Let's hope NBC sells that property soon! Maybe they could reboot the Waldorf or Shangri-La designs that I'm still sad never got built during the pre-recession cycle (I can dream
).