PCs today are a dead-end legacy technology. All of the PC technologies on the edge (things like enterprise laptops, POS terminals, etc) are being replaced by mobile or virtual devices. Companies are getting sick of the IT business and are increasingly allowing BYO devices. The legacy Windows stuff is going to get delivered with remote apps, virtual desktop, etc. It's already happening.
How do you justify spending $750-1,000 every 36 months on device replacement when you can spend $20/month for amazon workspaces and buy a cheap thin client every 8 years or have employees BYO?
If we weren't in the post-PC era, Microsoft wouldn't be porting their entire stack of Office products into web delivery platforms. When was the last time you landed a new fat-client application at work?