Is the K.K. Slider concert the end of the game?

Is the K.K. Slider concert the end of the game? Tom Nook finally stops giving you tasks when Slider shows up to perform his concert, which will only happen after your island reaches three stars. The credits finally roll, and the game is sprawled out in front of you, ready for you to do whatever you like rather than have to run around after Tom Nook.

Tom Nook finally stops giving you tasks when Slider shows up to perform his concert, which will only happen after your island reaches three stars. The credits finally roll, and the game is sprawled out in front of you, ready for you to do whatever you like rather than have to run around after Tom Nook.