We do, it's basically Google and Apple's business model with Android [1] and iOS -- they're just better at hiding the monthly fee.

[1] Yes you can have non-Google subscribed Android devices, doesn't mean that Google is banking on all but an insignificant portion of users doing that.

This has already happened in the workplace. A lot of offices have computers that are 'thin clients', meaning they run a very minimal, locked down OS that only lets them connect to a cloud-based Windows environment, managed by an IT vendor like Citrix.

No data is stored on the company hardware, it's all in the cloud.

Microsoft has been testing the concept with Office 365...just you wait.