[12ren]

There's an issue of need satiation. Once a need is met, further improvements can't be absorbed. Like water when you aren't thirsty, it doesn't matter.

Hardware helps performance - but this only matters when more performance is needed. For example, if features or usability are needed, extra performance doesn't help. This is obvious, but it's surprisingly easy to get caught up in improvements that are better, but that don't matter.

For productivity of programmers, faster hardware only helps when performance is a problem. The article says: If [it] makes them merely 5% more productive... - that's an "if". Will a faster PC make you more productive? These days, compilation is too quick for me to squeeze in a swordfight. For other hardware (eg large screens) there is also a limit beyond which extra real estate isn't useful (Joel on Software talked about several of his coders that don't use their second monitor). It depends on the task, of course.

Faster is always cool and impressive. But like a 300 miles per hour station wagon, will it help you?