Disclaimer: I believe U2 is greatest band in the world. I haven't seen or heard a better band in my lifetime and I don't think I ever will. Also, I'm a paying fan club member and own almost everything they've ever released. If I don't have a physical copy of it, I'm sure I have it digitally.
I believe U2 will release one more album after Experience and call it day. I'm thinking it's just a matter of time, I think they know they have nothing more to prove. Quite frankly, I hope they do what R.E.M. did. Put out one last amazing album and then call it a day. Everybody shakes hands and