Yep. It does look bigger than others regular cities.
However, I'm analyzing this city below, and I don't think it is so populous and big. So, the Steampunk City and the Snowy One are probably the largest ones, and also the most populated ones.
Does it look a city to you?
Me too. I hope they reveal the barracuda fish, Impidimp and Sirfetch. But, if they opt for showing some stuff about characters and history, then maybe they'll reveal only one pokémon, as the 7 August Trailer did (only Morpeko + Bede + Marnie + Team Yell).
Only stating, so far, we don't have any Bug, Psychic, Ice, Ground, Poison, and Fighting pokémon showed. I hope they reveal some of them soon.
Add: I'm not considering Galarian Weezing as a new pokémon.
I'm kind of pessimistic about this direct. I mean, this will be a Nintendo Direct, not a Pokemon Direct. So, I can see GramFreak wasting a few minutes (1-3 minutes) for Sword and Shield. Maybe we will get something like Nessa's reveal trailer.