High technology prosthetic devices

This video is about the use of technology to improve prosthetic devices and to potentially modify and extend abilities of human bodies. Where does the right to healthcare end in the United States? Is it rationing to provide these devices to some people and deny them to others? Is the "line" the point at which the device provides enhancement beyond natural abilities, contrasted with "merely" restoring a lost functionality?

iPhone ECG Application

My guess is that apps will also be written for purposes of verifying medical compliance. For example, Medicare does not want to continue to pay for CPAP devices that are not being used by patients. An application could be created that would interface with the SD card in the machine to verify that the patient has actually used the machine at least four hours a night.