Yes, the title says it all, almost all, that is. It will be an option for a while, and you will be recommended to use it, similar to the new skin. Then it will become mandatory.
In fact, remeber all that negative feedback about the new skin? Now, we're hanging onto this, and we'd be mad if they changed this into something else! After a while, the Portal will just slide right in.
You can get to it through the "Community" drop-down menu at the top.