I know that it's wrong, and odds are I won't end up doing it. By the time that my MacBook Pro is sold and shipped, it would probably be a week before they're announced. I have another laptop in my house that isn't often used; only by my mom (yes I live with my mom, I'm a teenager) for college work and she's done for the school year right now. I also have my iPhone 4S that I could use. However there are certain programs that I DO need for my job (I work for a photographer) so I don't know how long I would be able to go without one. I wouldn't be able to borrow my mom's laptop because it uses Windows and I use many Mac-only programs.
But really, is one return going to harm this company that much? People say that it drives the prices up for us but I doubt that the pricing will change much at all for the next gen of MacBooks...
Prices are set by a lot of things. Keep in mind that next year may be an even more significant upgrade. As far as one return is concerned, there is no guarantee that anything will be announced at WWDC. It's being hyped for a few reasons even though it contradicts Apple's behavior over the past few years of making it about software, not hardware. Even if they do announce it then, there isn't a guarantee of immediate availability, and any kind of custom configuration may push things back. If they make any drastic design changes, it would make me wait to hear about any potential problems.