They're not cities. If those things are cities then anthills are mountains that reach through the clouds. It just annoys me how Bethesda calls a settlement that barely deserve to be called villages 'cities'.
If you want to know what a medieval city should look like in terms of scale look at Rome in AC: Brotherhood. Or even Florence.
If you remember in AC, you can't talk to any of the people populating their cities. Also, there is hardly any variation in them with the exception of Rome. Florence was the same repeat of monument, small buildings, monument, buidlings, etc. As far as I'm concerned, Oblivion had much more in depth cities that I could get immersed it.
I digress though, i'm not here to hate on AC, which i actually liked quite a bit.
On topic, from what little we have seen of the cities, they look quite diverse in locations and I'm looking forward to seeing more