Current PowerMac and upgradeability?

Well you better see if you can find any units that fell off the back of Hon Hai/Foxconn's delivery trucks.

These modules are an order of magnitude more difficult than current upgrades, don't expect upgrades.

Sell old machine and buy a new one...

Edit: I'm talking the current modules being a heck of an engineering challenge that current upgrade companies might not be able to toss enough cash at. The PPC970 is a literal PIA to do a simple power on reset, the rest of the PPCs were literal cake to bring up to a stable clock.

 

Two words - you can't! More words - it would not be possible to "upgrade" from the current Power Macs to a dual core system, if you're imagining replacing the CPUs or the motherboard etc. The 970MP is not pin compatible with the current 970FX processors - so you cannot replace the CPUs without changing the motherboard. As for changing the motherboard, which is the most expensive part of the Mac, it may not even be worth attempting it - you never know what kind of "other components/subsystems" the new 970MP based Power Macs would come with.

As indicated in the previous reply, your only option is to sell the old one and buy the new one.

On the other hand, it's highly unlikely that there'd be 970MP systems just a couple of months after the recent updates. The historical trend (see the "Buyer's guide" on macrumors) is at least 6 months between updates. I doubt if Apple would screw its customers by releasing a major upgrade such as 970MP within a few months of updates to the current Power Macs.