Jobs has done such a great job of becoming Apple's evangelist that some investors fear the company will fall into disarray if he leaves, or passes away. This also is addressed in the obit as well -- gossip site Gawker.com published the mistakenly sent out obit:
(IF STOCK DROPS): The decline is no surprise to investors and analysts, many of whom considered Jobs irreplaceable. Gene Munster of Piper Jaffray & Co. in Minneapolis had said if Jobs left the company for any reason, Apple's stock might plummet as much as 25 percent.
It's also quite interesting to read the go-to contacts for comment in the event of Jobs' passing. This includes Al Gore, Bill Gates, Steve Wozniak, Larry Ellison, and more.