Wife really likes the big 4K monitor we have, and the Macbook Air's 13" screen is too small for her. To be honest, I really don't feel like buying a new PC to d

Wife really likes the big 4K monitor we have, and the Macbook Air's 13" screen is too small for her. To be honest, I really don't feel like buying a new PC to do what the iPad Pro could already do. Besides, she could use a new iPad and the 9.7" iPad Pro is only $599 vs the 13" MBA at $999. I wish iOS had a setting to drive a 4K monitor and turn the iPad into a multi-touch trackpad with mouse/cursor support. Yes, I have the Surface Pro 3 w/Win 10 for work and the split-personality works pretty well for me.