Apple finally let the iPad out of the iBag Wednesday, with all the style and hyperbole the technology industry has come to periodically expect from Steve Jobs’ company. Jobs and several other Apple executives demonstrated the company’s idea of what a tablet computer should do before an invitation-only crowd of nearly 500 influential tech journalists, bloggers and analysts at San Francisco’s Yerba Buena Center for the Arts. What the audience saw: a 9.7-inch color multi-touch screen surrounded by a sleek black frame that’s half an inch thick and weighs 1.5 pounds.