LOL, guys, I'm seriously going to retire from saying this going forward but I'll throw it out there one more time for posterity.
Midtown does not allow 50-story towers unless the tower only takes up 1/5th of the land (and that is a best case which most developments don't satisfy, many are more like 1/6 or even 1/8). Therefore you're looking at a skinny tower on a huge lot that is otherwise full of parking, private plazas, etc. That is how they were done in the 80s, 90s, etc. Now they are doing shorter towers that fill the block, i.e. Hanover which has the mid-rise office portion or NCR with the dual towers.
People here would be complaining endlessly about any design that was that was 50 stories and met the FAR requirement, rightfully so for the most part because it would not be urban. It would also be extremely expensive. We have exactly one developer trying to pull off a 50-story tower right now (Opus)... they have not been able to make it a reality yet due to the price they need to sell the units at, and people are already complaining about its parking pedestal.
If you want a wave of tall towers you're just going to have to wait until developers have gotten interested in Downtown again. My guess is that will be at least 8-10 years from now.
I promise you will never hear this from me again