I really love the keyboard/trackpad combination when my MbPro is hooked up to a monitor. II use it at work all the time and it would be great to also be able to use that at home or wherever I go with the lighter/smaller keyboard.
At home i also use my Macbook to connect to my tv with HDMI. With the wireless keyboard and trackpad it would be a lot easier to operate it when whatching a movie or series, instead of running across the room every time,