Make no mistake, Apple is betting that the iPad Pro is going to be the future of computing. Calling it a super computer, incremental iOS updates that are used on (dock, file system), changing of OSX to macOS, furthering their own chips. I don't think it will be too much longer before they wave goodbye to their UNIX base, say goodbye to Intel, and get rid of the traditional laptop as we know it.
If they drop UNIX (which I personally don't think will happen, but this is Timmy's Apple), I could see a lot of devs getting pissed. They rely on that UNIX base for a lot of command-line level stuff.