For those who don't game or edit videos, this has been true for about 8 years. I retired my 2004 1GB RAM Dell desktop in 2012 and still keep it as a backup. The ever increasing speed of browsers and the shift of my work from the desktop to the cloud kept my system operating at the same speed it did 8 years ago - not blazing fast, but good enough.

I expect my Sandy Bridge replacement system to go another 7-10 years before I replace it.