800Mhz machine was 'good enough' for almost anything you'd want to do.

This is about on the same line as when Bill Gates said that 64K is more memory than anyone will ever need on a computer. It's not a reasonable statement to presume we'll have "enough" because in time, developers will find ways to make use of any advancement in technology, driving it further upwards. Eventually it reaches a point that requires the technology to take a quantum leap into new realms. I hope I live to see the next cool leap.