The more a cryptocurrency is used and has transactions the more likely is the price to increase. Steem has an advantage compared to other altcoins because it has
Steemit, a social media platform where people can earn Steem when blogging or commenting.
Steemit is not only a blogging website, it is built on a blockchain and users like you and me can create apps on top of its blockchain. This is one excellent reason for Steemit to become very successful in the future and as the user base grows, the Steem value will also increase.
EOS has the same features to offer,but I don't think that EOS will disrupt steem but on the other hand it will help.
Remember a little competition is always good. This competition will help both of the platforms and crypto currencies to improve, So chill mate. I look forward to seeing EOS based platform.