VTO is an elusive dream, that has been in "futuristic visions" for over 100 yrs. It is unlikely to happen in the near future. The power required to lift heavily-loaded passenger aircraft vertically is enormous, and the single greatest problem besides that, is noise levels.
In an era where everything possible is being done to reduce noise, VTO continues to remain an impossible dream, unless there is a major technology breakthrough.
There has already been major inquiry at high level into VTO, and I note that no summary is included in the heavy reading below - because no-one can envision what aviation will look like in 50 yrs, because of the unknown advances that may occur, in a different direction to standard thinking, because of one or two major scientific breakthroughs.
Imagine what would happen to aviation, if a scientist developed a breakthrough in teleporting the human body?
A Review of Vertical Takeoff and Landing Technology in the National Airspace System