I have only seen half, but from what I've seen this game will be great for sure. Heavy Rain is one of the few games I would never ever sell and I'm sure I'll say the same thing about BEYOND: Two Souls in the near future.
I really enjoyed Heavy Rain, the story, the choices. In BEYOND I want to experience the improvements brought forth to decision making, the events/plot setup to help drive the gamer's decision.
I'm enjoying the SciFi elements to the story. For what I've seen, I can't wait to find out what is happening to Jodie, the being/energy that resides in her and why they have become one. Furthermore, if she can use this "gift" or "curse" [however you feel about it] for good, then why not find a way to have a better life for yourself and those who at some point in time will prove to love you for you who are and not fear/condemn you for what you are not.