I can't say that I've looked into the RC pools or delegation that much, other than what I've read about them being worked on. It will be interesting to see the demand, though. If you have to rent delegation to even post, and then pay to get your post anywhere so it can be seen...

SMTs are a little less fuzzy now than they were a year ago, but people seem to like putting together tokens on STEEM-Engine and forming communities around them, so seeing the practical use helps, even if it's not really SMTs at work.