In the "Crazy Ones" ad, alot of them were brilliant people. Many of them legends. But not all of them had the same charisma of Steve Jobs. He was a badass in tech. Imagine if Star Wars never had its Darth Vader and Han Solo? Boring. Maybe that's why most of the prequels sucked. How can you replace Steve Jobs? You can't. Everybody who follows him will look like a cheap stand-in like trying to replace Ozzy in Black Sabbath and Steve Perry in Journey. You don't watch John Lennon leave the group he helped started and then still call your band The Beatles, do you?
Apple can have his vision and DNA going forward, but they no longer have his intuition, charisma, and swag. Keynotes will never be the same without him.