With the new Macbooks being released shortly, the MBP will need quite a substantial upgrade to justify the price premium. It seems likely that many of the enhancements will be implemented. The HD webcam is probably pushing it a bit, but at MBP pricepoints, the system seems is geared towards power users anyway.
Of all the suggestions, I think the 18.4" hi-res screen with SSD drive would make it worth the premium.