I would like to buy the Asus PB287Q 4K monitor for work (coding , writing papers etc) and use it at 1/2 the resolution, i.e., 1920 X 1080 (my eyes are not great for a 30 year old.. can't do native 4K). I plan to upgrade to a 2015 MBA in 3 - 4 months from now, which I hear can run this monitor at 60 Hz and 1920 x 1080. However, I currently have a mid-2012 MBA Core i7 running Yosemite. Can I use this MBA to power a 4K display for a few months? Can I run it at 1920 x 1080 and 60 HZ? Thanks!