Ottawa is going to face some seriously tough, unpopular choices in the next 10-20-30 years as the city continues to grow. They've held off so far, but I think you're going to see houses expropriated and bulldozed to make room for wider roads. The unwillingness to do that is what turned King Edward into an automobile slum (not to suggest that an expressway would be better), and we're seeing the same thing occur with Booth and Bronson, and other north-south streets like Woodroffe, Pinecrest, and Kirkwood.
The good news is that, unlike other cities that just indiscriminately leveled neighbourhoods in the pre-freeway-revolt days, Ottawa has the opportunity to transform its city in a way that incorporates new urbanism - making way for the automobile without sacrificing the neighbourhood and the pedestrian realm entirely. They can use a scalpel instead of a sledgehammer, and I think it'll be fascinating to watch it all unfold.