Yeah I was going to say... They've done something which is cool, but really we already knew it was possible, and is not the hard bit of optical computing.
Essentially they made a fancy prism. We need an optical transistor.
Essentially they made a fancy prism. We need an optical transistor.
The problem is that they are big, slow, monochromatic, hard to build and actually consume more energy than transistors to operate. That's why a breakthrough on that would be interesting.