There are still a few variables possible.
Toronto has to win in regulation time. That means no overtime, because that would give Montreal one point, and hence a tie in the standings. A tie gives it to Montreal because they have more wins.
The other possibility is that the New York Islanders could possibly win their remaining two games, and that, coupled with a Toronto win... would eliminate both the Leafs and the Habs.
In any case, both Good Chris and myself will need to be drinking tonight.