While I don't think this is what you are going for I think Steem has huge potential when niched out to compete with sites like Trip Advisor.

I am not sure if it is technically doable but imagine a site like Steemit.com but targeted to vacationers. It works just like Trip Advisor but the people who do reviews can earn Steem and the Steem can be used (directly or via seemless conversion to Bitcoin or Dollars) to book trips and what not. You could run the site based on Affiliate income from trip booking, like Trip Advisor, plus use CPM ad revenue to invest back into the Steem ecosystem.

I think Steem has the early makings of something that can actually take on things like Trip Advisor, Yelp, even Amazon. Thanks to the nature of encouraging, via Steem rewards, both creating content and upvoting good content.