As good as most product shots have become, they still can't compare to walking around something, or turning it over again and again in your hands. But a Charlottesville, Va., startup called Arqball claims to take product visualization to a new level, with a free app no less. Using an iPhone or iPad, you simply take a 360-degree image of a product as it turns, like the video camera pictured here. Arqball's app turns the image into a "spin," an image you can rotate and even annotate. Arqball's idea holds the potential to make ecommerce far more engaging and lifelike.