You can reclassify some job responsibilities into "non-nurse" jobs, but there are legal requirements that only nurses may dispense drugs in a hospital.
How does the law define "dispense"? I used to work at a drug store. Only the pharmacist was allowed to assemble the prescriptions, but he then gave them to me to give to the customer. Can a nurse "dispense" the drugs to a nurses aide who then "delivers" it to the patient? Wouldn't surprise me if some places are trying this out until someone takes it to court.
Surgery rooms still require nurses.
But not as many as they used to. There have been cases documented where representatives from medical equipment suppliers were in the operating room running a new tool, demonstrating its function. None of the hospital staff though to ask if the representative (read that: salesperson) was a doctor. They weren't.
In short, I don't trust hospitals not to stretch every definition until a court orders them to stop.
BTW I can verify what Hugh said about the local conditions. My mother-in-law is a retired chief curgical nurse. Part of the reason she retired when she did is that the full-time staff kept getting longer hours and more call, while hired guns were brought in at twice the price to fill in the gaps. Within two months of her retirement, the headhunters were calling trying to get her to go back to her old hospital as a contractor.