not very far into the game but so far i wasn't very impressed with anything about it except sound. Oh, and holographic menus, those are cool.
Graphics are nice, but the amount of stuff the game needs to deal with certainly isn't overwhelming; small dark areas, which, being the only location in the game a space ship, are rather angular and simplistic: not very demanding in terms of geometry. I surely hope the game would look good and polished, with such a simple graphical premise. Still, i have already encountered a couple slowdowns and a few horribly pixelated shadows.
Oh well. Worst part is how quickly aliens stopped being interesting and more of an annoyance. Nothing too remarkable about them, i only encountered 3 or 4 types of them (and definately far too many of each ) so far though.
Mechanics feel like very standard stuff: "go to A, shoot monsters, do this, doing this unlocked door b, shoot more monsters, backtrack to door b" etc.
Storytelling so far has been neglectable, and you can guess what the plot twists are going to be right from the start.
Uh, better than RE4 ? Well, speaking about the game's core mechanics (controls, shooting, character movement) only yeah, DS is a bit better. As a whole, though ? so far it's been like dark sector compared to gow (2 !); its smaller, thinner, poorer little brother who always wished he'd be like him.
Seriously, i'd say RE4 is huge, it's Capcom magnum opus and one of the most complete and well crafted gaming experience ever. Dead Space is a solid game with a good presentation which owes most of the hype to the alien setting which hasn't been put to good use in years, not much more imho and unless a lot of incredibly amazing stuff start happening in the game at this point