[Metro-One]

I would say Vancouver would be a couple hundred thousand more.

Mt. Baker would be a symbol for the South Coast.

There would likely be another Penticton sized town in the Okanagan between Osoyoos and the border.

Always irks me that it continued along the 49th in BC. The borders on the OP would have been far more sensible (for both the Lower Mainland and the Okanagan).

On the flip side if the 49th continued through Vancouver Island (which was a serious proposal by the US) it is hard to say what would have become of Victoria and Nanaimo.

Nanaimo could have become our answer to Victoria, maybe becoming 2 or 3 times larger than today, or the Canadian portion of Vancouver Island could have far less people than today, Nanaimo maybe only being the size of Campbell River.

Victoria could have become somewhat smaller or larger. The US, unlike Canada, would have likely built a bridge with an interstate between their portion of Vancouver Island and the mainland.

Without an open water treaty through the Juan De Fuca straight Vancouver Port would have suffered and maybe Prince Rupert would have become larger and more important.