I figure tabs similar to a standard browser across the top but you can open up a few (let's not get crazy) things at a time like a main feed, notifications, and someone you might follow. As an example maybe I have made a bang up post or reply that I want to copy/paste to another reply and I do not want to flip back and forth. At this point it would be a better work flow option at times. Just something to ponder is all.

It works close to have a tab might work but it's difficult to control. I use my back mouse button all the time and it seems to get confused on what "tab" I'm on. It seems to be close though and could work if I played with it a bit more.