I am going to be returning the SP4 I got yesterday most likely for the Retina Macbook. I really wanted something with a full OS with pen input for taking notes at meetings, but outside of that that SP4 didnt "wow" me, plus its HEAVY and awkward to be using for an extended period of time as I found out yesterday. If it were the same size as the Surface 3 at 10 inches, I think it would be a better bet. Anyway, with the MB being a smaller footprint and still being just 2 lbs (not a fan of the stand on the SP4) I was curious if anyone else has made the same switch and if the Core M processor was a limiting factor for you running Word, Excel, Safari, and Photoshop at once? MB: 11.04 x 7.74 x .52 in SP4: 11.50 x 7.93 x .33 in Thanks!