I just played the SH4 demo... ohmygoditisscary!
I was wondering how they were going to work the whole "stuck in a room" thing into the game, but the way they do it really is well done.
Here is another relly cool thing.. THE VOICE ACTING IS GOOD! I'm also so very happy that it is an Xbox title... I hate having to wait to get a new SH game for the superior system when it is released first on PS2... and hell, they never even put SH3 on Xbox, so they definately owed me this one.