Personally, I love the new look, as the use of tech that is concievable to the time of the audiance really helps to ground the people in the world. The sterile, clean world also lends itself well to the sort of primal survivalism that pervades the alien series. Think about it for a moment, when you look at the way the whole premise is set up, the prometheus is very much a product of our time, it is staffed by the best and brightest and is sent on a mission to discover the new and exciting parts of the universe.
Now take that and lay it into the way that science is progressing now. We are cushioned by our comfertable lives and the franly amazing tech that supports us. We, think that there is nothing that our science cannot overcome, no problem that we can't simply puzzle out. When you introduce the alien into the mix it and those sterile walls become streaked with blood it can be effective in smashing that delusion of safety by showing that all these amazing things are nothing in the face of the truely unknowable.
When I watch this trailer, I pretty much see a movie version of an Alistair Reynolds novel with all the inhibitor, blood spire, melding plague and clockmaker horror that that holds.
Or you know, things like plot, characterisation, themeatic underpinning, direction, scripting and soundtrack could be irrelevent in the face of the set dressing.