Speaking at All Things D in 2010, Steve Jobs famously predicted that "PCs are going to be like trucks": specialised devices that only appeal to people with particular demands of their computing experience while ordinary people would come to prefer smartphones and tablets for all their computing activities. Last month, Enders Analysis consultant Benedict Evans gave a presentation at BookExpo America entitled "Mobile Is Eating The World." In it, he laid out a thorough series of metrics that sugges