It is a lot like Windows RT, because I feel like they've been trying this model every year. Windows RT, Windows 10 S Mode, Windows 10X...
The latter (designed for dual screen laptops) is coming to single screen devices. https://www.theverge.com/2020/5/4/21246561/microsoft-windows...
Marketing it would be an incredibly tiny needle to thread-- promoting the OS can run Microsoft Office while immediately changing the message when they ask about every old no-source-available compiled-for-Windows-98 app.
It feels like the people who can switch easily probably jumped to Chromebooks already.