The real goal is a Boy 40th anniversary tour in 2020.
I brought this up in another thread. I could see it being like a series of club gigs or just a one-off, but it's totally possible and would not surprise me. It's the album with the best chance of having it happen after Achtung Baby.
Not only have they played every song from it live, but half of them fairly recently and it would require a relatively limited amount of guitars and effects which Edge possibly being able to pull it off with just one guitar. It's not a long record, has no real strain on Bono's vocals and would take very little in the way of rehearsal.
As far as AB goes, it's certainly possible and updating Zoo TV for a world where people are basically becoming half computer with all of our current technology would be pretty clever. Yes, they're getting older, but AB is way easier to pull off than Joshua Tree in my opinion. So many tunes from AB have been played in recent years so there's little they would actually have to learn and I don't think people necessarily need a faithful 1992 show so they could bring back, say, The Elevation Fly and that would be just fine.
But AB should definitely
open the show and then maybe close out the main set with other 90s hits and album tracks followed by whatever for the encore. This would mirror the front-loaded Zoo TV shows that featured a bunch of the album's songs.
The only two things hurting this idea?
1) They're going to wrap things up sooner than later. This band is clearly getting worn down and I don't think they ever even saw themselves taking it this far. In an interview here on Interference an eternity ago (go dig it up) they talk about putting out a few more albums and a third Best Of "because Walk On and Elevation need a home"....so I don't think they expected to be out here some 14 years later or whatever still doing this, but the long hiatuses between albums probably takes up a great share of the blame.
2) The general public isn't as into AB and U2 is also generally seeing a decline in their demand as a live artist. U2 fans love the album more than any other, but the general audience isn't as attached to it, so it would be a bit of a harder sell I believe.
I guess another point against it involves all of the choreography and such. Bono started just standing in front of a mic and singing on I&E for a lot of songs and now basically does that for most of these JT shows...so, how would he be expected to pull off The Fly and similar characters when he rarely does anything other than sing now? It's the sort of higher intensity show that I don't think they're capable of (hell, the current show is about twenty minutes shorter than what you'd expect based on past tours).