Even assuming it's impossible for a single person to produce something as good as a large team, why would this be "something to be really afraid of"? There will still be demand for high-quality films -- why wouldn't that demand continue to be met? It's been the status quo for at least a decade that one "normal person" can make and publish a "movie" (e.g. filming something on their phone and posting it on YouTube), and yet Hollywood somehow hasn't been upended.