[Spocket]

Actually, I'm going to go with Hamilton.

The reason is because it has the greatest potential of all three to reach one million first. All three cities are experiencing an economic boom of sorts but the difference is location. Hamilton is ideally situated in this respect. Of course, it all hinges on Hamilton actually taking advantage of this situation but eventually, with an ever-expanding GTA, sooner or later Hamilton is going to see a major influx as room runs out for the GTA. As it stands , Hamilton might remain a slower growth place for a while but within a decade or two it should pick up dramatically. In that time it's unlikely that any of these cities will have reached a million so barring population boom in Quebec or Winnipeg, Hamilton strikes me as the most likely winner in this race.