Now that the future of their group has been decided, judgement day is nigh for μ's. No, not that judgement day, but rather the Love Live itself.
With Nico having fortuitously drawn a prize slot for the event, giving the group the final slot in the competition (which doesn't seem like such a great draw to me, I've seen how Eurovision works), focus has to return to one last practice session, which the girls soon realise is literally their last practice session together. As a result, the group really doesn't want to part company with one another, finding time to visit a shrine before hanging around without actually wanting to go home.
It's clear that there's only one thing for it - to spend the night before the Love Live together at school, eating and sleeping together (get your minds out of the gutter, you know what I mean) before waking up bright and early and preparing for the show of their lives. What a show it is too, which concludes to rapturous applause and calls for an encore which they duly provide.
As this season of Love Live has progressed, it's been increasingly clear that a bittersweet feel-good story was the direction in which it was headed, and this is no bad thing when it's delivered with the sense of fun and emotional undercurrents running through it as this episode - it didn't do anything spectacular, but then again it didn't really need to other than provide a satisfying culmination of the entire series so far, which it duly did. This is mission accomplished for the show, pure and simple.