Yeah I'm going to have to very vehemently disagree here.
Cities Skylines is a game that SimCity can barely dream of ever being. Yes, there are similarities between the newest SimCity and Cities Skylines, but the quality of those two games is magnitudes of difference. The difference between Cities Skylines and the older SimCities (despite those games being better than their sequel) is even bigger, as all SimCity games before the last one use a grid.
As for Age of Wonders, I would kindly like to remind you that the first game was released in 1999, the same year in which HoMM 3 was released; the first (to my knowledge) to be a big hit. And even then, it already showed a depth in various aspects (in particular tactical combat and building unit stacks, but also things like diplomacy) which HoMM to my knowledge has never reached. On top of that, Triumph Studios has only been acquired by Paradox last year.
I'm not arguing quality - Age of Wonders is one of my favorite games and long ago took the mantle from HoMM. More that they aren't someone I'd expect significant genre innovations from.