SAN FRANCISCO - JANUARY 15: Apple CEO and co-founder Steve Jobs holds up the new Mac Book Air after he delivered the keynote speech to kick off the 2008 Macworld at the Moscone Center January 15, 2008 in San Francisco, California. Jobs introduced the wireless Time Capsule backup appliance, iTV 2 and the new ultra thin laptop MacBook Air. (Photo by David Paul Morris/Getty Images)