There are many platforms coming out in the near future which will be based on SMTs. These platforms should operate in a similar fashion to Steemit. They will have their own token which is based on Steem.
Appics will be a mobile based platform. In my opinion, it looks like a cross between the mobile based version of Facebook and Instagram.
Onstellar is a site that is based around paranormal activity such as UFOs. It's a neat idea.
We also currently have Trybe, a cryptocurrency blogging site which is based on EOS, and Scorum, a sports media blogging site.
I believe the end of this year and the beginning of next will see a great surge of sites that are similar to Steemit.
Be prepared for some serious blogging!