Dont worry guys, this will never replace the OS we use, It's not even in the same category even tho it's called windows. The main target of this Windows was is and will be the companies and remote workers. Why?
Let's say I have 50 people working for me, and so I need 50 PCs... or do I? Instead of buying 50pcs and 2-3 servers, I can buy 50 such licenses and 50 Chromebooks (or anything cheap that has a screen/keyboard/mouse) and decent internet and boom. All the employees log to the remote windows 365 and do their work with their office 365 without worrying about patches - updating - viruses, etc, Those also can be more secure as there is no real PC to hack or ransomware to attack. Additionally, those same employees can work from home or even a hotel if they travel as if they were working on their PC at work. On top of the above, I saved buying 50PCs worth of hardware and all the upgrades, etc.
It can never replace the real OS (to the metal) cause there are still uses for PCs and they will always need an OS. It's just a new market for those who need only windows/office apps. After all, some companies already use a similar approach called VDI or Virtual Desktop Infrastructure.
So no worries my good friend
@00Proteus00 We will still need you for your builds