So, it looks like everything is a card or on a card of some sort. In theory couldn't apple just upgrade the CPU daughter card when a new chipset comes out and thus making upgrading this machine with future CPU's a lot more cost effective?
Same with the GPU's, looks like they just plug into the central board. Apple (or a 3rd party) could probably just build replacement card with newer GPU's on them.
Since pretty much everything else is external, this could, in theory, be the most upgradable Mac yet. Of course, thats assuming Apple either comes out with the upgrades or releases specifics on how the hardware works. (one can always hope)
thats exactly what they would do.. all the future chip designs will take on this shape I'm sure... this device will be around for at least another 5 years i would guess.. so the next few generations of CPU / GPU I'm sure apple will offer. which makes it even nicer that you can probably upgrade this thing endlessly for the most part, or until apple changes its design. That is if the PCI bus remains the same that connects all the cars... but i still think with this form factor you could probably just upgrade anything