Still, though, it really resonates with me for how it captures that dusconnection we of the present have with the future we were promised ("Where's my flying car?") as well as Modernism's dark doppelgangers Fascism and Soviet Communism. It's like David Zhondy (sp?) said in his intro to Tales of Future Past where he mentions the dissillusion of those great sleek streamline rockets of the future falling down on London.
While you're right about the V2's impact on design post-war, I have to disagree that pre-V2 rockets weren't "streamlined". They may not have looked as sleek and aerodynamic as the V2, but they were hardly big fat bulky things. In fact, Von Braun's designs were undoubtedly influenced by the sci-fi designs seen in Gernsbeck's periodicals.
Take the ever-popular Flash Gordon serial rockets, which certainly predated the V2:
I'd call that slick and streamlined, personally.