It has indirectly, as if after some months (24 initially, 18 for a long period at least through the 80's and 90's, even less now) you can put for the same or comparable price twice the transistors on a single IC, older IC's with half the transistors don't exactly halve, but nevertheless drop in price. In my previous answer to you I listed some components that drop in price a little slower and the one that drops faster than CPU, the GPU (maybe because ATI-AMD and NVidia strengths are more balanced than Intel and AMD, and high-end graphics are optional for most users, so competition is stronger). While Moore's law affects only the electronics part of not fully electronic devices, like HDD's and optical drives, they are nevertheless affected, while other aspects of production cost reduction drive their other parts costs down. About BDD's it must also be said that there where initially production problems and shortages that drove costs abnormally up (other than forcing Sony to do that ill-fated scattered WW launch).