I don't think they will leave the x86 range of processors.
The ARM might be powerful enough for the small MacBooks.
But ARM cannot replace the high powered iCore and Xeon processors in the Pro line (like the just introduced iMac Pro) and not even the MacBook Pros and iMacs.

I also don't think they will completely merge iOS and macOS into just one OS.
They will certainly try to make as much common as possible. But some things should just stay as they are, because a desktop is not a phone or tablet.


Manfred

[ Edited by asrael22 03.04.2018 - 09:11 ]