Lenovo Yoga 900

While Microsoft and its Surface line have done the most to popularize the 2-in-1 device trend, Lenovo can take credit for pioneering the often-copied watchband hinge connecting the display and the keyboard, and which lets users flip the keyboard all the way back. The Yoga 900 is among the latest to embrace that approach, though the laptop is not just about flare; it has major power (Intel's Core i7 processor) and a great display (a nearly 4K touch screen). And of course, the portability factor -- 0.59 of an inch, 2.8 pounds -- deserves a mention. The starting price is $1,200 for a Yoga 900 with 8 GB of memory and 256 GB of storage.