I've spoken with many fans and the general consensus is that people (me included) would prefer that U2 (at this stage of their career, given they are getting older and more frail) should concentrate solely on releasing new studio material even if it means less touring. Touring is extremely hard on the body but recording more music in studio is something that would suit the ageing U2 members better at this stage of their careers. New albums since HTDAAB have been too few and far between, in part due to the band member's other commitments/distractions (such as, the spiderman musical, promotional work, Bono aid stuff, etc..)
the bottom line is that most fans would prefer new music over anything else
I personally couldn't care if U2 never toured again, if it meant their studio output increased
U2 fading into the sunset while casually dropping one album every two years would be brilliant