Well, it would obviously result in fewer Mac sales. Because people could use their iPhone (or iPad, or Vision Pro) as a Mac. So it would be good for iPhone owners, who don't need to buy a Mac, but bad for Apple.
>90% of actual or potential Mac users likely have an iPhone. If a substantial fraction of them can replace their Mac with the iPhone they already have, the negative impact on the Mac market would be huge.
I’m super doubtful it would be that impactful. Also, switching Mac sales to Vision Pro sales probably works well for Apple in the long run.