It's a big deal when a magazine or a newspaper has a redesign. Similarly with websites. It's something to do with the fact that it's easy to churn out issue after issue/page after page using the same layouts, fonts etc.
I would have thought that in the dynamic web world you could spend more time with your templates, spending more effort making them work harder for you, so each new page looks like an evolution, or a minor redesign, whereas you haven't put any effort into that page, you just put it in at the beginning. Does that make any sense?