Because Keystone is in the name, and the keystone XL pipeline has been on Canadians, and Americans minds for about a decade now, that's the only reason this is getting attention right now. the proponents for pipelines will see this as a reason to finish Keystone because they believe that it will be safer. Others will argue that a larger, newer one will only increase the risks of a larger spill. It's been a big talking point in Canada more recently with the Trans mountain pipeline as well.