I won't speak to the need of more icebreakers, but the last remaining sea ice of the multi-year ice in the Arctic hemisphere is projected to be in the Canadian Arctic Archipelago and north of it towards the North Pole. Regardless of how fast it's changing now, we're sort of stuck with it until the bitter end. I will caution you that every winter it gets cold and dark and all the ice comes back in terms of the horizontal extent. The requirements are going to be there for the decades to come.
On April 27th, 2009. See this statement in context.