I sorta feel like these heli-pads would be a point of congestion
And good luck getting your helipads built around a city like San Francisco. Gigabit internet now comes down from the power lines because people whined too much about a little metal box on every corner. Or even buried under the sidewalk on every corner. (here's an idea. replace all those useless mailboxes with last-mile fiber access points. Problem solved.)
I hear the 'Simply just live near where you work!' crowd already. Hey look, we all can't work stuffing envelopes from home. And guess what? Lots of people already do that, anyway, but we don't live in the same building where we work. I live in the same city but my commute on non-train days still sucks. For a new system of commuting to work, you need to get people from where they live (neighborhoods where houses and apartments are) to where they work (downtown.) I don't see a time where most cities will be cool with helicopters buzzing over densely populated residential areas.
Commercial flight works (mostly) because there's better economics in moving a couple hundred people at one time in the same vehicle. The smaller the vehicle, the less those economics work. There's a reason why so many people take a bus to work and no public transportation system in the world is made up of a fleet of cars.
I figure Airbus has smart people working for them somewhere, but this just seems rather unfeasible. And frankly just kinda dumb.
I'm waiting for a new startup to propose public zip-lines as a means to disrupt the moving economy.