I suppose they are not, but we expect more of YC because it is supposed to be funding the best of the best, and people are noticing a decrease in quality over the years. But maybe they are not sharing their big visions with us as much, so we can't appreciate the latest YC batches as much. Nonetheless, I can see some grand visions in the list provided above without much scrutiny. Take car insurance for example, it may not sound like a worthy cause, but the economic efficiency gains would be huge if someone disrupts the car insurance industry! Maybe people can't appreciate the domains as much as before.

And maybe a better way to judge the market is to look at what Sequoia is funding over the years.