The Geekqualizer doesn't render the preceding rounds obsolete, it is just set up in a way to make sure that the last round is meaningful. You have to set it up in such a way were the contestants both have a chance to the very end, because watching two people play out a contest which the outcome has all ready been decided doesn't make for good TV. Still, it's better to be way ahead going into the Geekqualizer than way behind. Often the leader doesn't even have to answer a question, as the trailing player fails to answer enough to take the lead. I hardly think in those situations that the first two rounds was meaningless.
I will clarify then. I think that the challenge rounds are truly more difficult, especially if the challenger makes it to the final "Get as many answers in (x) seconds" portion.
It just seems after all the harder, more trivia-based work, someone who is obviously outmatched can still win the game by knowing that Stripes is a movie, and the White Stripes is a music group. Being able to distinguish movies from television and from music is much easier than coming up with the answer to a movie question (obviously this is not always the case though I will admit).
"Oh would you stop being all stealthy and just get in the truck"- Tom Servo
They haven't outright announced it yet, but I'd bet cash money on late July/early August. The fifth season is slated to start in September, and they always like to have the previous season on DVD to help market it.