That first person portion of the trailer made me thought "are they gonna have it be in first person this time? or at least the option to?"
Also infected/zombie looking Jill in one scene made me think are they gonna have some viral infection feature like in Outbreak?
Anyways, this looks not as scary as the older games, but that was the point because Resident Evil 3 was at the time the most action oriented game in the series, and it fit the setup. Jill is trying to escape from this Zombie and Mutant infested hellhole of a city that's been quarantined. So its more survival then horror.
What made it a spooky experience was Nemesis stalking you throughout the whole game as this almost invincible boogeyman, pretty much exactly like the Terminator.