While Hamilton definitely has had something of a building boom going on, loads of the developments are crappy generic pre-cast Lego builds.
Kitchener has a lot of really nice-looking stuff on the go, and the heights are impressive. Twelve buildings of 40+ stores are either under construction or proposed. Another eleven buildings of 30-39 stores are either very recently built, under construction, or proposed.
Kitchener database:
https://skyscraperpage.com/cities/?cityID=323
Hamilton database:
https://skyscraperpage.com/cities/?cityID=307