The Rule
Good world-building requires thinking out the consequences of your operating premises and having them thoroughly inform the rest of your story.
Description
A stock phrase barely altered from The Simpsons, Season 5, Episode 8, "Boy Scoutz 'n the Hood", "trucks carrying goods and workers" is meant to describe a world both post-apocalyptic and dystopic, and also 35 years in the future—but which features a setting more-or-less exactly like 2011 in terms of education, economics and social attitudes.
Similar to the lack of description in A variety of '80s dance moves, this speaks to a deficiency that is more than cosmetic.
Commentary
Ready Player One's world-building is paper-thin, but consider that Harry Potter has all of its characters walking around with the equivalent of guns that fire with no permanent consequence, and yet wizards are constantly being bullied. Of course, both series are wildly popular, as is Mayor of Noobtown, which is tediously detailed and alternately contradictory or meaningless.