That's not what the OP is arguing for. Let's just say for arguments sake, people who go out and get the nexus, and it isn't what they expected, then a month later the galaxy nexus 3 or whatever comes out with no prior announcement, with improved performance. I doubt anyone would sit back and take that lightly.
I see your point but I am hearing rumors there will be a "Nexus Prime" announced in a few weeks which will blow away the "Galaxy Nexus". That said, if I choose to buy the Galaxy Nexus now, should I be able to replace it with the Prime in December? I don't think so. We choose to be in this Android world for a reason. Choice!