Welcome to Winnipeg - Population 5 million

[balletomane]

According to the WFP book, City Beautiful - How Architecture Shaped Winnipeg's DNA by Randy Turner, the 1911 City Planning Commission expected Winnipeg's population to reach 4.5 million by 1984. Assuming it actually reached this goal and continued to grow afterward,
What would our cultural scene look like?
What would our economy be like?
How urbanized would surrounding municipalities be?
What would our architecture be like?
How might our demographic/racial make-up be different?
Would currently disadvantaged neighborhoods still be that way?
What effect would a Winnipeg of 5 million have on nearby cities (Brandon, etc.)?
Would the nickname "Chicago of the North" still be relevant today and not just in a historical concept?