So maybe it would be possible that in a few weeks or months time, we will see Canon posting a service note and state that if you take your camera to an authorized service center, they can perform "an upgrade" for x amount of money so that such limitations may be lifted. It would be similar to the updates we have seen in other cameras (or was it Canon itself as well?) that you paid an amount of money to have a feature upgrade such as support for an specific codec. So when Canon eventually drops the price of the camera, voila! it will be able to charge the same amount!
To be honest though, in the electronics industry things like this happen ALL the time. Firmware is the closest possible piece of software, so things do get tricky there and a lot of products with practically the same hardware have only changes in firmware. If Canon has done this thing here, I guess it got a little bit more clumpsy than the majority of the industry.
On the other hand, I think that Canon could be playing a very caution game here. Initial production of sensors and chipsets could very well be prone to overheating issues and maybe production is not stable enough to ensure a proper supply of chips of specific capabilities, meaning that Canon for safety went for the lowest denominator. After all, with the kind of clientelle that Canon has, dependability and reliability are top priorities. As such, Canon went with the safest solution and maybe eventual firmware updates will provide the time required to iron out more proper ways to measure temps and apply safety algorithms. Just saying.