I have one, possibly a big one.
That the UK public now understand that politics can achieve stuff, that if they engage they can better their position. Hopefully people will become more involved in grass roots politics as a way of improving their lot rather than passively be told what to do.
I think that's an optimistic interpretation of a vote that a large number of people used as a protest about their current situation. The bar for political engagement is a bit higher than "cast a vote".