Well, here's to hoping for a 15" MBP that is under 2.5 kg that will be released before the end of July.
It will hopefully have:
2.6 GHz CPU (if it's not available at release, then 2.4 GHz should do fine)
Standard 2GB RAM, upgradeable to 4GB (for a reasonable price, of course)
The X2600 Mobility, hopefully with 512MB GDDR4 RAM
- More likely that it will come with an X2300, which would be far better than the X1600, I'm sure
As much Robson Flash Memory as Apple can jam in there
A higher resolution screen, whether it be LED backlit or not
160GB HDD standard, upgradeable, of course
At least 5 hours of "claimed" battery life
A redesigned case would be nice, but I don't really care
Of course, Leopard and iLife 2007
Everything else can stay the same, I don't really care about iSight cameras, or new keyboards.
I should think that even if this doesn't end up happening, this prediction seems very likely to me, and so if the new MBP isn't this, I should think it will be very close. Except for maybe the graphics card, which could be anywhere between staying with the X1600, maybe the X1650, the X2300, X2600, or maybe even one of NVIDIA's new Go 8-series that will probably be released about the time that ATI releases their GPU spread, easily in time for WWDC, and/or the release of the Santa Rosa MBP.