Steem is the platform to be going forward.
You are grasping the echelon but surely you are heading to the top.
SMTs will be coming.
As of now we have plenty of other platforms that ride on top of steem.
Let's start with:

• steemit, it is the largest used platform to post.

• esteem, the mobile platform that make it easy to access steem blockchain and interact by posting, etc.

• busy.org, a diferent interface to access steem, write and post.

• dtube, access steem blockchain, deliver videos just like youtube.

• dmania, good to share photos and memes.

• dlive, I see a lot of gamers in there, posting live game while they are playing.

• Zappl, a platform that uses steem and you can post just like twitter?

• utopian.io, It focus on contribution to the platform, it is a way for developers to show their work, but it is a way for contributors to come as well.

• Appics, social media running on top of steem.
  There are so many, this will be the strentgh of steem in the long term.