If you think Apple wont spend the next 5 years trying to bring this reality to applications running on their (currently) MacOS devices you're an idealist who's in for a rude awakening.
A lot of things that are apps on iOS are simply web sites on macOS.
Yeah ok now you're an executive at Apple and you're tasked with fixing that issue, what do you do? Assuming your bonus is at stake here and you're not a HN reader who has a fundamental affinity to the concept of a "Computer" not a "Device"