If you think that aircraft can fly wherever they want, I think you should really look into how flying works. Good luck getting above 3000 feet in any city without asking for authorization. The FAA will be all over your ass before you even land. The skies are quite crowded and there are not all that many people flying today. This is part of the reason we do not have flying cars. If we did, there would be too much flying traffic and accidents would be a hundred times worse because they would also endanger everyone below.

I don't think you comprehend just how complicated a system like this would be. Everybody cannot have their own lane. There is just no space for that. If you have not noticed, we have a thing called "zoning" in the U.S. This means that people tend to all live in clustered resigential areas and work, shop, and do business in a designated business zone. These zones would most likely be connected by lanes. Even in three dimensional space, thousands of people will travel from a point A (where they live) to a point B (where they work).

Now, realistically please tell me how there will be no congestion on these lanes? Are there going to be hundreds of them stacked 1000 feet high? There has to be enough space between them to avoid collisions. Where do you think they will build these lanes? Probably not in all directions because nobody is going to want one of these tracks over their house.

Property values will plummet if all you can see outside your house is tracks filled with pods zooming by. Not only would it ruin views, but the sounds of passing pods would also be distracting. Things moving through air st high speeds make noise, even if their motors are electric. Also, the tracks would produce a hum due to the extremely high voltage and current it takes to create these magnetic fields.

Most likely, many of these tracks will be built over or along existing roads. Even stacked, this would lead to dozens of pods on each track running at any one time in any one area. Next time you are in a large city, look at the major roadways around it. Many of these highways tend to have several overlapping stories of roadway (in Dallas they have four or five roads over each other in areas). There are thousands of cars on these roads to accomodate the millions of people. We are not talking about moving a few people here and there, we are talking of moving EVERYONE.

I honestly do not think that you have thought about this concept beyond its coolness factor. Next time you walk through a city, look around at all of the people walking. Now imagine them all in pods rushing through the sky above you. Can you even see the sky?