The counter to this is that Universal's hotel doesn't have enough rooms to replace all the rooms on I-Drive. So the concept of this drives out other hotels may happen to those already on the brink, while it allows other hotels that are operational to fluctuate their rates to be just under Universals.
I honestly can't see a major theme park's hotel charge $73 for long. It's not sustainable. It would become a money pit. That's not sustainable today for shareholders. Shareholders couldn't care less about the 4th park 5 years from now. If an asset is draining profit, it will be rectified.