UV has already shown great advantages for a variety of applications.
When talking about disinfection, most people immediately think about chlorine. Chlorine has been around since the late-1800s, so it does have a great track record. But there are other ways to disinfect water. One advantageous alternative is ultraviolet light.
Light can disinfect? I'm kidding, right? Nope. Specific wavelengths of light do have disinfecting abilities. Sunlight is one of the best examples.