In my personal experience with my Penryn 2.6 17" hi-res with 4 gigs Ram and 512 MB VRAM and my brothers Santa Rosa 2.4 15" with 256 MB VRAM, I would say there is honestly not a very big jump in performance gaming wise between the two.
Hey, I appreciate this feedback!! That really tells me that I need to wait a bit... so I went to Fry's and purchased 4 GB ram for my current MBP and asked my wifey to hold out until a really good revision comes out to the MBP line. She said she was creating a laptop fund for me so I have the cash to just walk in and get one when I'm ready. I really love my current MBP's performance and based on your feedback, it won't hurt me to wait to see what comes out! Thanks a lot!