By Nick Bilton July 2, 2010 7:30 am July 2, 2010 7:30 am John G. Mabanglo/EPA Steven P. Jobs, Apple’s chief executive, holds up an early version of the Apple TV. Knock, Knock. Who’s there? Apple TV? Apple TV who? In September 2006, Steven P. Jobs, Apple’s chief executive, announced news of the company’s latest offering: the Apple TV. Mr. Jobs had high hopes for his latest creation, so high that he