You act as if it is some great conspiracy that the Home app is a port from iOS. They outright said that it was a proof of concept for the cross platform framework they are working on.
My apologies if that's how it came across. My intention was to support the parent comment's assertion by pointing to a live example supporting his claim.
Honestly we already discussed this when Marzipan was announced. I guess the news here is just the years they're targeting? Regardless, a lot of the comments here are worried about what the headline implies, which is much more sinister than "a fast and clean way to make an iOS-focused UI app also work on the Mac." And there are already live examples on macOS that actually work fairly well!