Hey gang, getting ready to make the switch from the Windows world to OS X, and a mac pro is in my future. I've been lurking here for months reading up on Macs to learn what I'm getting into. I was hoping the new ones would be here by Christmas, although it is looking doubtful now. Anywho, if I do pull the trigger and buy one of the present Mac Pros, I was wondering if the future Mac Pro's upgraded video cards (whatever they may be, but surely they'll be upgraded) will work in present Mac Pros?? The hardware architecture is not changing, so the only hurdle would be compatability of drivers. Would Apple possibly prevent the new cards from working in the present Mac Pros using firmware/OS/driver blocks?? It would be a way of forcing present Mac Pro owners to buy new ones instead of upgrading the present ones, however I just couldn't believe Apple would stoop to that kind of tactic.