This describes my exact situation currently. The 10.5" I ordered was purchased instead of a 2017 rMB to update my 2015. I will keep the rMB as a crutch for the first few months, but fully plan on going laptop free professionally as well as personally, with the iMac as the desktop workstation pretty much solely for video editing. (and being the home media hub of the house)I'm hoping with the 10.5 I just ordered that it will be my only mobile computer. I have a 2015 macbook but elected to keep it without upgrading to see if I can get away with just iPad for mobile computing. My iMac isn't going anywhere though, something you just need a big ass screen and desktop class processor.