Well, on personal note my situation is going to be a bit different. I am a dual citizen and
live and work in US and will continue ( hopefully) to do so, but my spouse and child will land in Canada and live there. They will be in Canada and I am in USA. All our family worldwide income is my US income. Yes, it will be significant residential ties to Canada - spouse and dependent child, but I think that this phrase is applied to my situation - even if I am " a deemed resident of Canada (because of ties) and is a resident of another country (USA) that has a
tax treaty with Canada, I may be considered a deemed non‑resident of Canada for income tax purposes".
What do you say?