I agree lots will move to SMTs. Some of the good ones at 1:1 swap with no changes to distribution or other parameters because they are good. Others will move and do a little 'reset' because they need to try again because try one failed due to poor management and moderation.
It's pretty obvious that some tokens will have more value per token than Steem since several of the stable tokens (ex/ BTCP or EOSP) already do. With the added assurance of SMT, those may actually become more popular and have more than ~100USD volume per day. I think you mean some may have more overall value than the market cap of Steem or at least all Steem Power. EOS (while still ERC20) and a few others sized up well against Ethereum. If I had to guess it will be social networking like a video or streaming service first, then maybe something like a consumer points system.