Your post resonates with my thinking as well. Cryptokitties is a heck of a neat blockchain experiment/product that utilizes many aspects of the human nature. Many want to own something rare, and humans love to speculate (greed), hence this is why this new game is quite popular. We should have similar dApps on the Steemit blockchain with the coming of SMTs. I would not be surprised if we have Crypto Pokemon, or a Crypto Real Estate Tycoon(real estate management game), or something more useful like a dApp for marketers to be able to rent screen space for their ads on Steemians' blog pages, and the owner of the blog page would get some revenue in Steem or SBD PPC style.
Just some thoughts. Let me know what you think.