I'm sure there will be a next Next Big Thing. I'm also sure that nobody here knows what it is. If you do, tell your stock broker instead of Hacker News, and become a billionaire if you're right. That's what makes geniuses geniuses - going all-in on the right thing at the right time.

People in the 1890s and 1690s and so on probably thought they were plateaued on things too. What are the odds that we're the real plateau? It might not be in consumer tech, but it's out there, waiting for the right person to discover it.