The executive’s Ultrabook, the X1 Carbon is (appropriately) made out of carbon fiber, allowing it to be very strong, but this machine weighs a mere 3 pounds and measures 0.7 inches at its thickest. As usual, the X1 has a superlative keyboard and Trackpoint, and we like that the 14-inch screen has a resolution of 1600 x 900 pixels. And, with nearly 8 hours of battery life, the X1 will be able to last a whole cross-country flight. Running low? Lenovo’s premium Ultrabook reaches 70 percent capacity after just a 30-minute charge.