Well my biggest worry is that Steem the blockchain itself is in danger due to it relying too much on Steemit Inc. If that's solved, I think Steem will survive, one way or another. I do have big hopes for SMT's since they will enable people that care and share ideals and moral rules to organize and build their own ecosystems. One of the biggest problem has always been the distribution of Steem. Those who hold stake in systems like these play huge part in how successful it is, so SMT's that manage to give largest stakes to entities that think long term and can view ideas from far away perspective will prosper.
What can we two do?
Now that you mention that, I do have one project that you might be interested in. We should chat on discord about it some time. It's too late
for me to touch upon your comment fully, but I'll just say that I saw Steem as a platform where people would reward good content they personally like. If millions would do this, the trending would be really interesting place to visit, attraction that non stakeholders would also want to visit, every day, but sadly this isn't happening. Perhaps some day though, with the help of SMT's!