just a thought. i see a lot of people saying the game isn't particularly original. granted, i see that most people don't get, but for me Dead Space feels like a type of game we SHOULD have been getting for a while.
when RE4 came out, it totally reinvented survival horror. it was perhaps a bit too actiony, but i think Dead Space shows (with strafing and moving and shooting at the same time even) that RE4 style survival horror can indeed be scary. you can have great gameplay and frights. i find the dismembering gameplay incredibly tense, having to make each shot count, and having to adjust aim from limb to limb.
when Halo refreshed first person shooters with it's array of small but effective changes (recharging shield, insta nades, limit weapon set, powerful melee) everything started using that mix of gameplay elements. we don't call a game unoriginal for using the Halo template for FPS anymore. nor should we i don't think.
Dead Space is the first post RE4 game that seems to acknowledge all the ways that RE4 progressed the genre, where as most other survival horror titles have all but ignored the brilliant work Mikami did in bringing the genre leaps and bounds forwards. hopefully the success of Dead Space will CEMENT the new breed of survival horror while showing people that, yes, it can still be scary at the same time (of course it doesn't scare everyone... fear is pretty subjective, but i think most would agree that Dead Space is scarier than RE4).
i loved Silent Hill Homecoming, but playing Dead Space made me realise that it was a step backwards for the genre, at least compared to RE4. call that proper survival horror if you like. i'm not certain if i like Dead Space more yet (haven't finished it) but just looking at the gameplay mechanics and remember how much RE4 got right and how few games since have acknowledged that... i think Dead Space is a pretty important title in the genre for evolving the RE4 template.
even though i'm only a quarter of the way through Dead Space, i can't wait to see what they do with Dead Space 2.