Yes that is exactly why lean agile development was invented. It should be standard practice in most development organizations by now, but yet people still want to believe that it's possible to reliably anticipate what customers want far in advance. Sometimes you can guess right but that's a risky proposition and seldom repeatable.
To keep you iterating, to ensure iterations are productive, to wrangle those disparate stakeholders into evaluating the "now" and to turn criticisms into the "next".
