I think of him as a conservative Mike Davis. No insults intended to either. They're both writers who make the subject of suburban and urban change seem exciting.
They both read like propaganda writers too: biased, myopic, but also meticulous about facts. They both have a thing for Latin American immigrants. They both also pander to the anxieties of Anglos. Davis portends disaster, but also some kind of redemption in an exotic and interesting multicultural future. Kotkin delivers assurances that the foreigners in our midst have family values surpassing those of white people.
It's all about book sales.
I couldn't find a Davis homepage, but here's an unofficial page about him.