It is highly unlikely there will ever be a singular "cure for cancer" as cancer is a bit of a blanket term given to multiple diseases, however this is a seemingly reasonably good breakthrough in treatment - being able to destroy cancerous cells without exposing the patient to further harm via targeted radiation or harsh chemo drugs (basically targeted poisoning) feels like a win.
If we can break the cells down and let the body's immune system take care of the remnants instead of having to slice someone open, huge win!