I would say there were only 2 quite mainstream dapps developed so far. Let me know if you know some others.

One is cryptokitties.....which halted after 2 weeks because ETH didnt stand a chance to process it and users left.

Second one is Steem, you are using it right now and and its here for 2 years.

Now take the ability to create stuff like Steem easily, quickly, with more features, 0.5 block time and better governanace.

I have ETH, Im quite sure they will upgrade and they might be fast and cheap and just as secure. .....but not this year.