Usually, CES, the world's biggest tech show, takes place in Las Vegas at the beginning of January. This year, the show has been forced to go online.We look at what this means for the tech industry and what trends and gadgets might emerge from the virtual show floor. From wearable tech to smart homes, we explore the latest gadgets and gizmos that will be 'virtually' on show and explore whether the conference of the future may be online.