Yes, it's not user experience design, unless you consider that Pink Floyd's most popular album has provided a unique musical (and often mind-altering) experience for over 35 years. This Wired article asks readers what albums they think could compete with Pink Floyd's trippy masterpiece.
As someone who owns every album Pink Floyd released, I'm also partial to Animals and Wish You Were Here, but Dark Side of the Moon is a masterwork.
But why argue? Can't we all just get along? Don't think of this list as 24 contenders, but rather as a great list of classic concept albums. Some will argue that albums like Pet Sounds were at least as if not more musically influential, but for sheer popularity it's hard to argue with DSoTM's over 700 weeks on the charts and almost instant universal recognition.
Earth’s Coolest Concept Albums, Decided By You | Underwire | Wired.com