What can actually change, and periodically does, is how Parliament defines a principal residence or how the Canada Revenue Agency applies the exemption to a property with a rental suite or a period of non-occupancy. Those are the levers that matter to a Saskatoon homeowner, not a foreign legislature's tax bill.
A Saskatoon seller's real exposure is usually smaller than assumed anyway, since a principal residence that was your home for the full ownership period is generally exempt from capital gains tax under current federal rules, separate from municipal property tax set by the City of Saskatoon.
If a headline about American tax law made you nervous about a Saskatoon sale, the two systems do not connect, and the better use of your time is finding out what actually applies to your house.
Get your hand-reviewed valuation from Joel Dyck.