Maybe check out Ross Douthat's recent book about "decadence" as a place to start. Not sure I buy the argument, but this is part of what he's talking about.

For me personally, I think it's just the point we're at in the current technological revolution (in the Carlota Perez sense). We're due for a new one (maybe biotech, eg. driven by crispr, mrna, etc.) so things feel stale.