This is not new technology, it is just the first to deal with atoms at that level.
We have been manipulating elements for years, we have been treating cancer with different elements for over 100 years now.
Over the last several years, proton therapy has been becoming more incresed as the control you have of treating children, there is no exit dose and more control to normal tissue. There is a new machine out that we can actually treat cancer around the spinal cord with photons(the radiation released when the electron is kicked out of the outer shell) to double the doses we have been able to use a decade ago, due to the control of these elements.