This is no surprise with his recent health challenges.

Jobs is one very talented man.

Steve Jobs resigns from Apple, Cook becomes CEO - Yahoo! News
SAN FRANCISCO (Reuters) - Silicon Valley legend Steve Jobs on Wednesday resigned as chief executive of Apple Inc in a stunning move that ended his 14-year reign at the technology giant he co-founded in a garage.
"I have always said if there ever came a day when I could no longer meet my duties and expectations as Apple's CEO, I would be the first to let you know. Unfortunately, that day has come," he said in a brief letter announcing his resignation.