Isn't it a bit misleading to compare this to Windows or macOS, when it is actually Ubuntu with a preinstalled window manager, like Gnome or KDE, and it just looks a little like macOS out of the box? From the web-site I couldn't tell why I would consider it over established options like Linux Mint. To qualify as a replacement I would expect it to run native binaries. LibreOffice for example is a replacement for Office as it can handle xlsx and docx etc.