In the PowerPC days, Apple had trouble convincing people to switch to Mac because Windows being so dominant, everybody was afraid they might need Windows for something and that would make a PowerPC Mac an expensive mistake. The Intel switch alleviated many fears because in the worst case and Mac OS didn't work out, they could just install Windows. Bootcamp and virtualization provided additional options.
Apple has always seen Mac and iOS as different markets. Mac is still a small market compared to Windows. They are still trying to grow which means still trying to convince Windows users to switch and the safety net of Intel is still useful. (Windows RT isn't a realistic option.) I personally haven't seen iPhone users wishing for a big laptop or desktop that runs their same apps.