The Macbook Pro Retina model may not be an ultrabook by heart but it is slimmer than the rest of the Macbook line up, except the Macbook Air, of course. The Retina model is a paradigm shift. You should only buy this only if you are ready to embrace the future of display technology. Apple has taken a huge leap with the retina display and apps look better than they used to.
* 15.6 inch display * 2880 x 1800 pixel resolution * Intel Core i7 quad core processor * Intel HD 4000 graphics * Discrete Nvidia 650M GPU * 16GB DDR3 RAM * 512GB SSD * 2x USB 3.0 ports * SDXC Card reader * 2x Thunderbolt, HDMI, Headphone * 802.11n Wi-Fi, Bluetooth 4.0 * Mac OS X Lion