Both Macworld and the Consumer Electronics Show (CES) – two of the world's most popular expos – kick off this week. But they're both missing their usual main attractions of Steve Jobs at Macworld and Bill Gates at CES.

In addition, Apple has announced that it's appearance at this year's Macworld will be its last, a move that could prove disastrous for the future of the show.
The keynote at this week's Macworld Expo will be delivered by Philip Schiller, Apples senior vice-president of worldwide product marketing, will deliver the opening keynote tomorrow in place of Steve Jobs, who has been a major drawcard for the last 13 years.
Apple has been scaling back on trade shows in recent years, including NAB, Macworld New York, Macworld Tokyo and Apple Expo in Paris.
Apple fans are hoping that the change in presenter won't affect the quality of products announced at the show.
There's speculation that this year's new products will include an iMac, MacBook Pro, Mac mini and iPod, as well as a new Mac operating system.
Fans are also hoping to see both an iPhone nano and a more affordable netbook computer.
The news that Jobs won't be making the keynote address has re-ignited rumours about his health.