Comment by jecel

Note that IBM introduced a 68000 machine just over a month before the PC came out, which caused some confusion at that time.

http://www.old-computers.com/museum/computer.asp?st=1&c=623

But 1981 was just too early for 68000 non workstation machines since the early chips were slow and expensive. The 1983 Lisa was limited to 4MHz, for example, in contrast to the 1984 Macintosh's 8MHz. I remember the price of the chips dropping from over $100 to less than $20 in just one year back then.