Rather an interesting thing to say, which begs the question....Why?
Well if you insist ...
(1) The titular analogy which becomes the basic premise for the show is silly. 1 million PAX airborne at any one time does represent the population of a small to medium size city such as Adelaide.
However that is as far as it goes. In no other respect are those 1 million PAX on thousands of aircraft comparable to a city.
(2) This feeble premise is used to justify the participation of the person who "does the mathematics of cities" who doesn't ever seem to have seen an aircraft before.
Great junket if you can get it.
(3) The story about the measures they take to heat an aircraft during a layover in Siberia was interesting. Although the many continuity errors were annoying.
(4) Apart from that the show seemed to consist of merely "wow isn't that big!" "how can something so heavy take off?" and "gee aren't there a lot of bags!".
Maybe as a frequent flyer I am just not in the target demographic for this sort of incredulity.
(5) Opportunities to add insights weren't taken. The effusive segment on the A380 seemed either ignorant or out of date. While I hope that the rumours of its demise are exagerrated, it was wrong to
present it as the unambiguous future of aviation, without any mention of the way fuel costs and economic circumstances had placed its future under a cloud.
(6) As someone else has commented, showing the two freeloaders, I mean presenters, sending text messages to each other was juvenile.
