A lot of skepticism on this, but if the government put together a Canadian sovereign cloud, and then fixed privacy legislation so that government and regulated industries had to pay attention to "Data Sovereignty" instead of just "Data residency", it'd likely be fairly impactful.
Currently our government, medical, financial and so on is all in US cloud services -- meaning it's all subject to the US Cloud act, and not sovereign to Canada. If they put in that regulatory requirement, there'd be a ton of potential business to be had. But any attempt to put in a Canadian sovereign cloud would require that sort of legislation/regulation in order to be viable in my view.