The series 5 samsung toes the official ultrabook line, but this core i5-powerd Series 9 overhaul goes by the coveted title, The Worlds Thinnest laptop, with the 13-inch model just 12.9mm at its thickest point and 1.13kg. It boots up in a nippy 9.8 seconds, has a ten hour battery life and on the top model, squeezes a 15-inch screen into a 14-inch body. Please, don’t call it an ultra book
