I dont know how people expect it to get thinner. SSD will not be standard as it is simply too dear at the moment, which leaves HDD to fit the bill. So blade only SSD's is not going to happen.
Higher res screen with antiglare option on all models
i3 default for 13", i5 (15 and 17") with option from quad i5 or i5 processors on 15" and 17".
320HDD default options to upgrade to SSDs
Optical drive optional (choose between a secondary drive bay w/ larger battery or just a giant battery for those who want 10+ hours)
Improved graphics cards too
design and everything will remain the same.
Same ram specs, I don't think people need more than 8GB on a laptop.
Apple is not in favor of usb 3.0, light-peak isn't ready yet and sata is the only possible extra port but i doubt that'll happen too.