Quebec will be isolated and surrounded by the US. Those Frenchies will sure have their panties in a twist - too bad. Next time they boo our national anthem in their scuzzy hockey rink, we'll just kick them (Montreal) out of the NHL and we won't have to worry about playing "O Canada" in our rinks anymore because there will only be American teams left.
Obviously upper Canada will remain territories as they are pretty much unpopulated.
This would make the United States the largest country (in area) in the world and we would have access to additional natural resources that are incalculable.
Not a bad deal in that context.