Obviously the demand for computer furniture 30 years ago was extremely small. Prior to creation of the early Apple II computers and original PCs, office desks were built with typewriters in mind. In fact, all of those low extensions attached to rectangular office desks were set at the height specifically designed to accommodate typewriter keyboards. But as everyone knows, the computer keyboard is completely different and all of us seem to have our own personal style as to how to access them.
We might also want to point out that aside from the keyboard there is still a matter of the computer monitor to deal with and considering that many of these now are 23 inch wide screens, there needs to be a place for these that allow not only easy viewing but also proper line of sight so as to avoid eye and back fatigue. With all of these factors in mind office furniture companies have shifted the emphasis in design to accommodate computer furniture. The familiar penciled drawer has been replaced with a special sliding shelf for keyboards. Desktops invariably have holes drilled all over them for cables. We tend to work now in stations and require tabletop screens so as to define our individual workplace and allow us a bit of privacy.