Come on, anon. That's like saying Ash winning a badge or catching a Pokemon is "development". She couldn't touch Pokemon for retarded reasons, and now she can. How she got there, because she spent time with Pokemon. Something she apparently never thought of trying before.
That is what I was going to post, but really, that's one of the bigger character moments this fucking anime has ever had, so I'll let this bitch have it.
As for what's "next", NOTHING. They'll just have her around until when and IF some plot happens.