Just like the title says.

I think for me it's going to be the proposed Lindell/Olive and north-side streetcar (plus Loop Trolley), CORTEX, entire OPO area and the finished Ballpark Village. Okay, so that's quite a few developments for me to pick, but it's hard to just pick one. What about you?

This will be an interesting thread to look back on years from now, when we can say, "Oh, yeah, ___________ wasn't built yet! Weird."