<p>@GMTplus7 Effective multitasking has a lot to do with resolution. When you split the screen the effective resolution is reduced for each window. This makes the windows blurry and unclear if the resolution isn’t high enough to start with. Going from a 13" air to a 13" retina pro will be almost as big a difference as from a 13" air to a 15" retina pro, and be $700 cheaper. </p>
<p>My father found this out the hard way after buying a 24" screen for his office and realizing later that his pdfs were easier to read on a tiny 12" galaxy pro with a much higher resolution (2560x1600). Screen size only goes so far. </p>