Why does you Disk Drive work?

That's kinda shortsighted, don't you think?

Computers have changed the world. More than you can imagine, I guarantee. Think about all the progress we make because we have computers. They're not sketching those models of nanodevices out on drawing paper, building them and hoping they'll work. They're using computers to simulate having one in the bloodstream, for example. It wouldn't be possible without computers. The faster they get, the more we can do.

I don't know what will have a bigger impact, but I would place my money on "computers" for short-term impact.