Mechanical Computers superior?

Here's a link to a blog post in NewScientist technology blog (from BBC) that discusses the advantages of mechanical computers based on nanoparticles over the present silicon based computers. This would be interesting to compare to my previous blog on optical computing. In any case, the field of computing hardware remains a place with great potential for change, and, for all we know, it will go through a paradigm shift. After all, recording technology has often gone through such shifts - from varieties of analog recording to varieties of digital recording.