This definitely seems to be the most realistic path forward considering the integrated graphics issue and the iMac release.
Could anyone then see Apple slipping a feature or two back into the macbook (like firewire) when the upgrade to the mbp line comes? I'm thinking their removal is due to apple wanting to differentiate their product lines.
Also, I'm thinking that when the quads come out, Apple will first put them in the 17" mbps, and eventually putting them in the 15" and then the 13" models. Like it or not, they're evil geniuses at upselling.