Greed isn’t new. Simply more prevalent in the travel industry.
I do not think it is all greed. hotels are a great example of supply and demand. If you have a 100 people wanting your 10 rooms, you are hardly going to offer discounts, and you certainly will price to improve your profit, you're running a business, not a charity.
The same really goes for museums, air tickets, train tickets, if you have more customers than you can handle, raise the price to control the crowds.
Basically $1000/night hotel rooms are not greed, it is what people are willing to pay. If no one stays there, then the $1000/Night issue will take care of itself. The problem is not hotels, it is us. (By that I mean a collective "us", all mankind, no one on here, of course, is part of the problem ;))
An addition: I have been looking at rooms for about 6 weeks in April and May, across two "trips" and 6 countries, and yes, I am seeing some increased cost, not terrible, but I target for 100 EUR/night average, this trip I will probably be closer to 110 EUR average, maybe a bit more. I also am seeing more demand pricing, steep increases for events, even for just busy times.