What OS the Commodore Amiga series is running is the important part. I would suggest you wait till we all hear what the OS is going to be and then judge it. No, even I don't know what the final OS is going to be for it anymore.
You don't find that worrying?
Your brain doesn't tell you that you don't make a new OS out of thin air?
It is going to be an existing "off the shelf" OS so that means Windows, MacOS or Linux. Considering Microsoft and Apple will not be amused with someone slapping some wallpaper onto their installs and calling it "CommodoreOS", that leaves Linux where the Linux community is going to be very amused to see an existing distro hyped as a "new one" due to added wallpaper, UAE and VICE.
I can only assume that the "delay" is because nobody involved with C-USA knows how to install Linux and when they do get it running then they're going to install it one hard drive at a time on Barry's coffee table.
