Just got back from an impromptu E3 visit. And holy shit, this game is good.
I played through most of the demo. You've heard a lot of this stuff before, so I'll skip to the stuff I found interesting.
1) In my playthrough, the voicemail about the wedding tape was from the husband, not the wife. He was quite threatening towards the intended recipient.
2) Cybill's conversation seemed exactly the same. She even asked if I had been drinking when I said I didn't drink to relax. She was playing with her gun when I walked in, which was quite unsettling. Not sure if that was in the dev walkthrough.
3) Wow, the chase sequences are intense. Since I had seen the video, I was curious as to how many options were available while escaping. And let me tell you: even in the first chase, the answer is "quite a few". When I hit the first branching path, I went right instead of left. That lead me to ANOTHER two branching paths. I took the right one again (crawling underneath an obstruction), and that led me to a door which took me outside. I hopped a waist-high fence but got killed at that point (I kept accidentally pulling out my phone, which really wore me out. But you can see the monster's locations on it, somehow. ) The game handler told me that you could actually go into the house I was running towards, at which point you had two stories of building to explore.
3) The monsters are indeed very smart. Depending on how they pounce you, you have to shake in a certain direction to throw them off. You can hide in any location with a white glow, but if they see you go in, they won't hesitate to drag you out, as seen in the latest trailer, above. Also seen in the previous trailer, they can grab you when you're climbing or crawling, forcing you to shake them off quickly, lest they prevent your escape.
I'm 100% sold on Shattered Memories. Day 1.