JamietheEdgefan
Refugee
You're assuming that all the ideas brainstormed by the U2 team were used on this current tour. I'm sure there are things they decided to hold off on, due to new technology or not fitting in with the rest of the bells and whistles.
They have people that just sit around and dream up shit like this, and I doubt they just turn their brains off for three years. And I'm sure they've already had the discussion of "where do we go next after the monstrosity we just toured with?"
That's a good point, didn't Bono actually come up with the idea for the 360 'claw' towards the end of the vertigo tour?