When Apple officially launches iCloud this fall, Steve Jobs won't be on hand as CEO. Jobs resigned the Apple CEO post today, shifting the Apple CEO crown to Tim Cook. Can Cook extend Apple's dominance from mobile computing into the cloud? We'll get our first clues when iCloud officially arrives.

As you may recall, iCloud is a family of free cloud services that work closely with Apple's iPhone, iPad, iPod and Mac platforms. Oh, and just for good measure: iCloud will support PCs as well. Apple's goal: Allow consumers to wirelessly store all of their content in the iCloud, while automatically synchronizing that content across all devices.

In some ways, Apple is considered invincible. HP's decision to kill WebOS and its TouchPad tablets last week reinforced Apple's market dominance.