1 Account = 1 Vote
Oracles
SMTs

All of these changes are proposed future changes to Steem but they aren't part of Hardfork 20. And the 1 account/1 vote thing and the Oracle thing are almost completely vaporware at this point. SMTs are still quite a ways away, and those two things may or may not be a part of them. If they are it will push the development time out even farther.

@steemitblog has a summary of what's coming in HF20.

I'm glad you like my proposal, and the idea of tying the participation rewards to a 1 account = 1 vote scheme is intriguing. I'm going to have to think about that when I'm more awake.

I think in general we don't have enough systems in place to make sure quality new users are supported and rewarded, and thus if we start bringing in lots of new users we're just going to end up with lots of former users. This isn't helped by Steem Inc.'s unwillingness to use any of their power on curation/retention initiatives. We can have all the dApps in the world but if people aren't connecting it won't matter.