It's the scariest game I have ever played.
It's scary at the beginning, but is very predictable and repetitive.
The only (almost) recent game to date that managed to make me jump many times was Clive Barker's Undying, which had excellent ideas for the job. Otherwise, it's much if they make me jump at all. For example, while the atmosphere was tense, in the first half life I made a jump only one time (a good one though) in a air shaft right after the headlight went off and a headcrab suddenly jumped at me... my sister was watching me play and literally jumped back as well. :)
Never happened anything similar in the sequel however (and though HL2 has an excellent atmosphere, Episode 1 and 2 are reminiscent of Doom 3 in their extremely linear level design).
It's a lot easier to get a creepy atmosphere than actually scare the player/spectator.
There are far more action titles available than titles which manage to scare you.
Come on, after the first batch of japanese horror movies we saw a lot of horror games too. The fact that often these games don't manage to scare at all is another matter entirely. :)
Doom was always about having hundreds of enemies on screen at one time, I don't see how they can accomplish this with the polygon counts of today, even with this new Rage tech.
It has already been accomplished many times, from recent wargames which manage literally hundreds of enemies, to fps which manage tens on enemies. Techniques like geometry instancing and normal maps are there for such uses. And I don't recall more than ten, fifteen enemies at a time in Doom (looking at the maps today, it seems that I remember well).