This new lockdown in Ontario will shut down schools. And people in Toronto, Peel, etc. won't be able to go to surrounding non-locked down regions to eat out, shop at non-essential retail, etc. Since all the regions in Ontario are now in lockdown.

Thing is even if this lockdown were to work (there are examples like Belgium, Poland, etc. where they managed to get the cases down this winter with strict lockdowns), the spread is going to resume as soon as lockdown is lifted. We can't keep people locked down forever. Even if every single vulnerable person was vaccinated, they probably will still call for lockdowns and masks. Especially if they announce that the virus has mutated and that the vaccine doesn't work anymore.