It won't. I'm predicting around March til you'll be able to catch a glimpse of them on the selves. Too many parents promised they'd get their kids the system ASAP.
I waited in line and saw 70-90 people waiting for Wii's 1 week before Christmas with only 15 people getting them. Kids want Wii's and they didn't get them. So Santa left an I.O.U.