As I see it, Windows 10 is an abstraction layer on top of...well increasingly, on top of anything. The current iteration is a more robust abstraction over diverse hardware (where Windows for the Desktop has always found its strength) -- but now the stack is more unified from micro-controllers to just short of big iron.
Pushing operating systems under the abstraction is just the next step after decoupling Windows from hardware. In a sense that's been a theme for Windows since the development of .NET.
The value of Windows has been as an ecosystem and it almost certainly will remain one. The tradeoff of running Windows is a tradeoff and it comes with big advantages for some users.