I must say i've been disapointed with the clips in some respects and I truely hope I won't be as disapointed then the game goes gold. I'm hoping that Bioshock has the same feel and gameplay style as system shock 2 - and to be fair thats a very hard thing to judge from gameplay clips.
If they get it right I expect it to be better game than any simple linear FPS - the fact being that the system shock series are not FPS games at all but rather RPG/Horror/FPS. I do have my doubts about what they've come up with though.
Also Personally I would credit the system shock series with plenty of originality, something that I also hope is preserved in Bioshock.