This is a really good post but it is disappointing that nowhere in the post it mentions Chris Dixon's post on this: http://cdixon.org/2010/01/03/the-next-big-thing-will-start-o...
One example: Bitcoin (2009, but few had heard of it before 2010), cryptocurrencies and blockchains. I think these support cdixon's claim.
Another: Snapchat (2011) and other ephemeral messaging apps. These certainly seemed like toys.
Just because something found a market doesn't mean it's not still a toy.