It is well known that Apple is going to launch iPhone 6 and iWatch simultaneously on Sept. 9, 2014. However, this is unusual for Apple to publish more than one new product on launching event. Most of media predicted that iPhone 6 would come into market in September, and iWatch would follow after one month.

Ken Segall, who is one of the former Apple advertising executives, give users an explanation why Apple will launch iPhone 6 and iWatch at the same time. He pretends that he is still working in Apple .Inc and discusses whether these two products come to be released at the same time with Apple's marketing executives, and then he gives us a conclusion:

There are two big, juicy reasons to combine the iPhone and iWatch events. This would be the biggest event in Apple history, at a time when people have dared to question us. And - these are two products that are made to work together.

Like you just said, Apple has never combined two revolutionary products this way. So what. We will now stand Apple tradition on its head. This will be Tim's blockbuster moment, forever etched in history. Can you not imagine the extraordinary buzz from one monster over-the-top event, three months before the holidays?

This is a case where the whole is absolutely greater than the sum of its parts. One earthshaking event has more value than two "typical" Apple events.

I can see it now: we get an hour's worth of theatrics and demos for the new iPhone models, followed by the launch of Apple's long-awaited "next revolution". And then the kicker. Tim says: "You've seen the new iPhone. You've seen the fabulous new iWatch. Each is amazing on its own - but just wait till you see what they can do together."