No it's not.
Let's not forget the Sox were 1 game away from the playoffs, and while the Yankees were out in the first round, they still won 97 games and the AL East despite down seasons from a lot of their key players.
NESN isn't going away, YES isn't going away and those teams will still have money pumped into them.
And the Red Sox still are pouring money into scouting and development, as are the Yankees. So while this seems like a victory, both teams will be back in the playoff picture, if not the playoffs next season.
And the Jays and Rays are still lurking, with the Jays rising to power and the Rays somehow finding a way to cling onto what they've got due to their rotation and defense.