I think the longer a game is delayed, the more gamers expect it to be really good. If this game turns out to be mediocre, it may get heavier criticisms than it may deserve. However, I think the same holds true if the game does well - it may come highly recommended and even worth the wait.
I don't think it really matters. As long as Microsoft continue marketing their latest console officially as XBox One, it really doesn't matter what we call it. Won't tip the needle in either way. Good old fashioned marketing is what will decide in the end.
ramageddonights' comments