With its highly profitable iPhone due for an upgrade, Apple is expected to unveil a pair of new handsets at an event in San Francisco on Wednesday, analysts say, in addition to showing off a larger iPad and an updated Apple TV.<br />When Apple executives take the stage at the Bill Graham Civic Auditorium, investors will be scrutinizing their plans for the next generation of the iPhone, which drove nearly two-thirds of the company's $49.6 billion in revenue in the most recent quarter.<br />Apple is widely expected to keep the size of the phones the same but upgrade it with an improved camera and Force Touch, a display technology that responds differently depending on how hard users press their screens.
