Great explanation. I think SE and SMT tokens are going to give scope for niche credibility to be rewarded.
Say I'm a huge fan of the TV show, "Friends", and start a website. We have the SMT "Gum", so people who post interesting Friends content are rewarded with Gum.
One day, a new account "Maggiewheeler" arrives and starts posting.
There's no reason that a millenial cryptoanarchist coder is going to know that Maggie played Janice, and should definitely be rewarded and encouraged.
If her post is rewarded only in Steem, he's going to flag her and she's going to leave.
If curators need to be experts in every possible topic in order to differentiate between quality posts and over-rewarded posts; then we're not going to get very far.