iPad Pro + Logitech Create Pro keyboard + iOS 9.1 was a dream convergence device and portable terminal (ssh, vnc, rdp) with 2732x2048 (274 dpi) resolution in 3:2 format. The vertical space was amazing for text editing, after years of 16:9 height-challenged laptop screens. It can also be an external monitor for Windows/Mac via http://www.duetdisplay.com.
Until Lenovo Retro or another vendor offers a 4:3 screen, the iPad Pro was a rare and positive outlier with portable editing and long battery life. Then Apple iOS 9.2 arrived, which dropped and delayed keystrokes from the Logitech keyboard, https://discussions.apple.com/message/29656057. The amazing, out-of-box experience lasted about 2 weeks, a new record for technology obsolescence. It has not been addressed in iOS 9.2.1 or iOS 9.3 public beta 1.
Until Lenovo Retro or another vendor offers a 4:3 screen, the iPad Pro was a rare and positive outlier with portable editing and long battery life. Then Apple iOS 9.2 arrived, which dropped and delayed keystrokes from the Logitech keyboard, https://discussions.apple.com/message/29656057. The amazing, out-of-box experience lasted about 2 weeks, a new record for technology obsolescence. It has not been addressed in iOS 9.2.1 or iOS 9.3 public beta 1.