The Flipped Classroom is something of a rarity in contemporary educational thinking and practice in that the concept is based on a reasonably-sound argument (at least as far as something like a-level study is concerned), namely that in an exam system designed to test a range of weighted skills (knowledge, understanding, application, evaluation…) it makes sense to organise teaching time around the best possible ways to teach and learn these skills. In other words, where something like evaluation is highly-rewarded in the exam it makes sense to devote precious classroom time to developing and honing this skill, rather than using said time to focus on something (like acquiring knowledge) that can be usefully carried-on outside the classroom via various forms of guided learning.
While flipping the classroom may (or may not) be “the future”, 10 Reasons Flipped Classrooms Could Change Education is an interesting overview of why you might want to look at this idea further (and includes some reasons why you might not…).