I think the phrase" processing at the speed of light" is somewhat misleading.
The question is not how fast light or electrons move, but rather how fast the flow reached a stable lvl when the contacts of a switch meet(be this mechanical or inside a processor)
thats what resistance is, and expression of forces working against the flow of electrons.
IF you could produce a CPU that had zero resistance, there would be no restriction of the flow of the elctrons and the amount of processing power would be theoretcly unlimited.Also this would produce no heat as heat is a by product of resistance.
The problem with light is changes to its flow are not instantaneous, and this is why hardline calls on a phone are actually much faster than using satellite communications across the globe.
All that being said it looks promising, even if they really dont describe how it works.
I wonder how this will compare to the Quantum processors being developed by IBM and other sundry organizeations.
