Whats the difference between the "four vitual cores" of the Macbook air and the quad core of the macbook pro ? I'm seriously thinking about going for the MBA next yeat ealy next year, but wondering if (a. I should wait as I know Apple will be releasing a new mac line up, or B) go with the Air. I currently have a Macbook Pro, which is i7 (Early 2011( 256MB VRAM, but thinking of moving towards the AIr, as circimstances have changed in terms of strorage (no longer use optical media) and if (and only if) I do, I can just for the usb based optical drive. I know the AIr is limited to 4 Gig, but thats ok. I'm just wondering how this "duel core/aka virtual cores, compares to the PC Core Duo Any reviews side by side ? AFter all, when I think of duel core. doesn't really matter if its i5, or i3, i automatically think of the core duo that PC's used to have, then compare against that. I know i'm probably dead wrong here Any suggestions?? After all.... I can buy the Macbook Air, and return it within 14 days if I don't like it.. thats another thought.