Well, with today's Raptors win, Washington is now set in the 4 seed. Toronto could possibly get to the 2 seed, though it'd require Boston to lose out (unlikely). They are unable to make the 1 seed, though, because they've been swept by the Cavs thus far this year.
Thus, our last remaining chance of avoiding Toronto in the playoffs is to hope for the Cavs to lose 2 of the next 3. But it's more complicated than that. Essentially, they need to lose the next two in Atlanta and in Miami, because if they don't, then Toronto has no incentive to beat them in the final game of the season, since that would only bring them the Cavs sooner in the playoffs.
There is a glimmer of hope, though. Though it's unlikely, they very well could lose the next two games in a back to back on the road. Historically this season, they've been bad on the road, especially in back to backs. Further, both Atlanta and Miami are currently 2-1 against the Cavs this year, so they both present certain matchup problems for them. And with both of them fighting for crucial playoff seeding, they will be motivated, especially the Heat. Finally, the Cavs are not playing great right now, so there's a very real chance that it could happen.
And since they've already got the 2 seed locked up and have not rested an ailing Kyrie (knee) and Lebron lately, who has had to play a ton of minutes and has looked physically fatigued, if they lose today's Atlanta game, I could very well see them not playing their guys against the Heat. They'd be unlikely to win that game with how things are going right now anyways, and after their shellacking of Boston in Boston this week, they might feel confident that they could beat us without having HCA in the conference finals. Lue has said that he's not going to rest his guys until they locked up the number one seed, but that was before their loss in Atlanta. It's hard for me to see them pushing an ailing Kyrie and an aging Lebron that hard just for the number one seed when they just proved that they can beat Boston in Boston. Finally, since they've beat Toronto three times already, they should also feel comfortable facing them over Washington in the second round.
So today's Atlanta game is very, very important and could ultimately decide whether or not we get that first seed.