Today I did a little test! Using handbrake I converted one Full HD movie from mkv to mp4 H.264 using a 13 i5 macbook pro 8gb ram and a 13 i7 8gb ram 2013 macbook air. I set the keyboar backlight to the highest point and the same for the brightness on both machines. I started both machines with 100% battery and at the same time The macbook air finished the test with 65 % of battery left and in 1 hour 7 minutes and 5 sec the retina macbook pro finished the test with 20% battery left and in 1 hour 17 minutes and 7 sec! So the Macbook Air was 10 minutes faster or about 15% faster. What do you guys think? Considering the better battery life, being thinner and lighter and a litter bit faster for about the same price, is that good enough to forget about the retina macbook pro?