2006 Subaru Outback Sedan

2006 Subaru Outback Sedan AWDMacnovizSep 26, 05:08 AMSo, first it was the number of transistors per processor, then they coupled that with higher clock speeds (MHz) and now with multi-cores inside multi-processors. Is there a limit to such growth with the current technology? Anything after that? The optical computer that works with light instead of electricity and thus does not heat soo much?