Well, looking at the picture very closely, we'll know come August 30th. That's the day that this flyer supposedly becomes vaild. (Look closely in the lower-right corner. There are valid through dates; the August part is legible, the other month mentioned is longer and looks like September to me. Thus, that week.)
However, one thing does make me skeptical. Note the SKU on the new PS3: 8112394. While this SKU is not found on BB.com, all the newer items that are being added to the site (and that are availiable in stores) start with a 9. A SKU starting with an 8 is an older item. Plus I can't help but notice the lack of a SKU on every other item. So I can't say for certain that this is real or not, but something in me says no.
EDIT: Oh, yeah, and the price ending in 98? That's something else I've never seen BB do. That seems more of a Walmart thing. And why would a flyer for the that week prominently feature something that's not due out until the following week? (Price tag stating 9/6 release.) I'd almost say with certainty that it's fake now.