It has big chances of course. I am using it for a few days and I am seeing it as becoming a more and more active platform. Now the experience it is slightly different with Steemit as in here all our interactions are question based ones, but there's a lot of potential in it and I see it as one of the most used platforms built on top of the blockchain of Steem.
The difference though between Steemit and musing is that you might see a lot of questions being asked, but many of them could be addressed by the same users so you can get confused and think that there are many users being active which sometimes is not true.
However I assume that in a year from now musing will have at least twenty times more active users than it has now. It all depends though on the upvotes every user gets on the platform. As long as it remains "profitable" in that way people are going to join it and be active on it.