This may only be of interest to a small subset of readers, but a dvd of pc demos has been produced and is available for purchase. If you know about groups like orange, pulse, future crew, haujobb, complex, nooon, and others, check this out. The group that produced this dvd worked very hard to achieve high quality audio and video captures, and to obtain permission from the content authors for inclusion on the dvd.
Before I got involved in the software industry, I spent a lot of time watching demos, collecting and producing mods, and talking to and meeting people from around the world that were involved with the scene. Having a chunk of my history on a dvd makes it more accessible to my friends and family. It also preserves classic works of art at risk of obsolescence due to hardware requirements from many earlier generations of pc hardware.