I believe there will be dual-boot (or compatibility-environment) Mac OS/iOS systems.
In maybe 5 years or so.
And they’ll be big desktops, not portables. Something like iMacs, only laid flat. (Because neither your arm muscles nor a laptop’s hinges want to have pressure on a vertical surface. Though they could flip up for movies/presentations.)
This will happen when iOS touch-based computing has become so pervasive and accepted that pros want those same benefits in a high-end big-screen system (with a keyboard, even). But they’ll still need their legacy Mac apps too.
And I think they will be ultra-widescreen, maybe 24:10 or 3:1, because pros want big screen area, yet it must be spread out sideways near the front of the desk, not requiring too much reaching back (tiring and awkward). Apps meant for iPads might be used side-by-side, while “iPad Pro” apps might use the whole screen.
Some will probably even have a tower connected, allowing the touchscreen to stay thin, and pros to have their cards and bays.
So, to answer the question, No