I think it can be done like this: the early adopters can pay a fee to Sony or Microsoft and have them upgrade the hardware (either $100 or $200 depending on the upgrade involved). The late adopters will have to pay a bit extra for the new version of the console, but at a discount. They can pay either $50 or $80 more on the new hardware. I think this is the only way it can be done. For those who don't want to pay for the upgrade will still run the game smoothly, just not at the resolution or frame rate that the new hardware supports.