Son said, "I visited Apple for the announcement of the iPhone 4S [at Apple headquarters in Cupertino, California]. When I was having a meeting with Tim Cook, he said, 'Oh Masa, sorry I have to quit our meeting.' I said, 'Where are you going?' He said, 'My boss is calling me.' That was the day of the announcement of the iPhone 4S. He said that Steve is calling me because he wants to talk about their next product. And the next day, he died."
Son did not say what product Jobs and Cook talked about, but most likely Jobs was involved in plans for the next-generation iPhone that Apple is already working on. Jobs would obviously also have had input into other devices such as the iPad 3 that will be announced before the next iPhone, and he is said to have left Apple's pipeline with four years' worth of products that the company will use to plot its future.