Plus electronic technology is constantly developing, and getting cheaper.
In real terms, a 50" LCD HDTV today is cheaper than a 20" colour CRT set in the 1970s. As for computers the IBM PC was introduced in 1981: 4.77MHz,
64K RAM, BASIC in ROM, 360K floppy drive, monochrome monitor - $3,005. Today: HP with Core 2 Quad processor, 4GB RAM, Vista Home Premium, 500GB HD (no floppy), DVD writer, Blu-Ray reader, 512MB HD video, TV tuner with remote, 19" HP LCD monitor, HP all-in-one printer -