1981 IBM launches its first personal computer, the 5150. It doesn't have a hard disk and its 4.77MHz processor is about a thousand times slower than a present-day PC. Its 13 cm floppy disks' capacity is so small, that even if digital music existed, you wouldn't be able to save even one track to a disk. The CPU weighs almost 13 kilos.
2007 The Apple Mac Mini is just 16 cm square and 5 cm high. Its 80GB hard disk is about 84 thousand times the capacity of the IBM 5150's floppy disks. The Mini weighs 1.4 kilos.
I won't bore you with facts about my Video iPod ;-)