So I had a Solas dream, which was quite interesting, because it had DAI game mechanics, so it was like watching a scene from the next game.
There was a prologue to it, I think the first part of the dream was me assembling a team to storm Solas' stronghold (but it is kind of fuzzy), our spy got a tip on how to aboard a supply ship in order to get to the stronghold, we were preparing ourselves to infiltrate the place when I saw (and it seems I was playing the Inquisitor) an open eluvian, just inviting us to enter. It seemed like a trap, so we advanced cautiously, the rest of the teammates were a bit reluctant to go through a mirror (seeing they weren't acquainted with the Inquisitor for a long time and didn't trust her).
When we emerged on the other side, Solas just stood there, hands behind his back. He knew we wanted to talk and preferred to spare the journey and avoid danger to his recruits.
I can't remember the chat too clearly, up until the part in which Solas asks "so what are you going to do now?"
And then several answers appeared, there were 6 options methinks, one of them was "Dreamer", the Inquisitor answered she was going to train herself so she would be able to explore the Fade. Solas made an interesting face.
Another set of dialogue options appeared, "Qun", "Spirits" and more, I picked one out of 6, the Inquisitor said she will look for knowledge on how to help modern Thedas survive the sundering of the Veil.
I think another set of dialogue options appeared afterwards but I can't remember them.
After that Solas looked somewhat satisfied and some text appeared on the upper part of the screen, it was something along the lines of "Solas' mask starts showing cracks, your answers affected him a bit" and some more bla bla and then Solas just walks away, towards one of the stronghold's tower and just lets the Inquisitor roam about.
I was surprised Solas was there at the first place and realized I wanted to capture the scene in video (I do that a lot of time in the PS4, just save entire scenes) so I reloaded a save and changed one of the initial dialogue answers and my Lavellan just raged over Solas for feeling betrayed, "what have you done to me" etc. and stormed off instead of continuing the conversation.
So after that I woke up, realized the dream made some amount of sense (unlike most of my dreams) and that basically it translated into the idea that in the installment in the Dragon Age series we'll be able to lower and raise some invisible gauge that will affect the end result of the game. Your decisions, what you say to Solas, like every word of it, affects how he will react to your final plea or what will happen in the end in general.
It's like court approval, just hidden, and if you build enough of it you'll get special dialogue options that could lead to entirely different outcome.
Also, your previous relationship with him carries, a friend or lover of Solas will start with 50 approval, and Inquisitors with low approval will start with -50, just for example.