Methinks.
I think in all honesty they should just discontinue the 17" MacBook Pro, the 15" offers plenty of power (2.8Ghz and 4GB of Ram) not to mention the graphic chipset of the 15" trumps the current 17" MBP's. Currently, the high end MacBook Pro is actually the 15" and not the 17".
The only real benefit from the 17" that you could gain in the future is maybe, MAYBE, a Quad Core processor, and speeds of up to 3.0Ghz, and that might be pushing it. Also, you may see the increase of ram to 8GB and maybe if Apple is feeling giddy, they would include the 9400M chipset and a 9800m for the GPU. Blu-Ray drive, I could take or leave. Most of the Blu-Ray movies come with Digital copies, so I just watch the digital copy on the notebook and the actually movie on my TV, I just don't like carrying around a 30 - 50 dollar movie just for it to be dropped and scratched and trampled in a busy airport.
The only reason I could see for the delay of the 17", is the whole engineering aspect, I mean they re-engineered 2 notebooks and refreshed one so they had more than plenty on their plate. Not to mention the new 24" LED Cinema Display w/ Semi Docking Features. I say a new MBP 17" will probably be avialiable at MacWorld, but I would much rather see a display refresh in the new MacBook Pro, give the little 15" a 1920x1080 Res...please...110-113 PPI is not enough, give us atleast 130PPI 🙁