They are definitely going to call the next Windows version "Windows Copilot" or just.... Microsoft Copilot, just to make everything more confusing.

Microsoft Copilot Series OS

Microsoft The OS Formerly Known As Windows 12

Microsoft Copilot AI Desktop

Microsoft 365 Windows+Copilot (Formerly Windows 12) (New)

Nah, just Microsoft Copilot. No Os.

Microsoft aiOS