Richard Dashut said he doesn't think they will tour again at this level-- I gather he means big world tour-- he says because age and etc will take its toll. Who knows.
Might be that's why they decide to tour before doing another studio album..? Tour while everyone's health is still good, their voices aren't totally shot and whatever else… then do an album which is easier for old farts than the strain of touring…
But no one will know til the time comes whether they will actually tour again or not. If we figure an album not before late 2015 or, as it's seeming now, 2016, will they really want to tour in 2016? Maybe. Fingers crossed everyone's still in good shape in 2 or 3 years.