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Currently, there isn't a market for mobile quad-core processors.
Honestly, if you're going to buy it, buy it, or else you'll be waiting just like you are now, FOREVER.
Technology is updated all the time, and if you're video editing, perhaps a desktop is more suited for your needs. New processors will keep coming, but anything of significant improvement won't come for at least another year.
But it and enjoy it, or wait forever and just dream of it.
There is a market for games laptops using quad core. But I don't think you will see them in the MB Pro for a good while yet. If you REALLY want to wait then hold out another year and buy the Nehalem laptop's they will genuinely be much faster and more powerful judging by the desktop chips. Otherwise go with what you want.