Well, I finished the PC demo a moment ago.
I have to say, it's mostly hype, as I suspected. Old FPS stuff in a new wrapping - graphics. Many features are taken from System Shock, like the cameras and audio-diaries you find lying around. The demo even had one of those ghost encounters. It feels pretty much like SS2 with a modern engine minus the RPG elements.
Plasmids are simply additional magic-like weapons, eve acts as mana. When it comes to hacking cameras and bots, you have to either play fucking stupid pipe dream (arrgh minigames) or pay some dollars which you can find lying around the place (what a stupid solution).
So yeah, great graphics, great atmosphere and interesting story....BUT the gameplay is far from revolutionary. Just your run of the mill FPS.