Perhaps you might have noticed ipods, itunes, iphones, and even ipads (yes, a computer). Those other items are selling like hotcakes... computers, not so much.
http://www.gartner.com/it/page.jsp?id=1353330
Apple is still way down on the list of units shipped... Currently showing about a 7.2% market share. "Others" still show a greater market share.
But hey... buy what you want. It's your money. Caveat Emptor.
I have a feeling that stock holders wouldn't care one bit if Apple spun off the computer division and stuck to just making "devices."