Disagree. Generally speaking, when computers are binned, it's not due to the processor revision -- it's when the computers stop working. More updates, constant work and a pipeline of innovative CPU revisions is paramount to engineering products of the future; furthermore it means you won't be caught out with a competitor's product due to laziness.
Deliberately holding off on developing the pipeline for future products/revisions, or feeling self-secured in your current position, is one of the reasons Nokia and Blackberry are where they are now. It also annoys the people who rely on your products and encourages them to look elsewhere.
If Intel adopted this mentality, I'd argue that it would push Apple towards developing their own in-house chips; similarly to why Apple moved from PowerPC to Intel.