It isn't really the end of Windows - it's the end of Windows' dominance of Microsoft mindshare.
Windows 10 was the giant step in that direction - an always updating, maintenance mode, single OS that MS will need to support. Arguably until Win 7 dies out they won't be entirely there but once they are, maintaining Windows is a much simpler affair than yesteryears.
None of this means Windows itself is dying - it only means the OS has matured enough for the needs of present and any future needs will be addressed as and when they arise - instead of inventing the future they will abide with it on their own schedule.
This allows Microsoft to focus on things that truly matter for the future without killing Windows or spending a lot of resources on advancing/supporting it. It's not hard to imagine Windows stays a very dominant client OS for a long time to come - even if the overall PC market share continues to decline, because none of the alternatives are there and nobody is going to invest the resources to get them there.
I will also add that Satya's success lies in speeding up this strategy that started late under Ballmer and also in executing so well on it. Considering the scale of what MS is doing - Office ports to iOS, Android, Windows 10 releases, Azure, ton of other Enterprise stuff (Exchange, O365, Development tools, cross platform stuff like .NET Core, VS Code etc) - the change of course and the success they are having with it all - you can't argue it's not a phenomenal achievement.
Windows 10 was the giant step in that direction - an always updating, maintenance mode, single OS that MS will need to support. Arguably until Win 7 dies out they won't be entirely there but once they are, maintaining Windows is a much simpler affair than yesteryears.
None of this means Windows itself is dying - it only means the OS has matured enough for the needs of present and any future needs will be addressed as and when they arise - instead of inventing the future they will abide with it on their own schedule.
This allows Microsoft to focus on things that truly matter for the future without killing Windows or spending a lot of resources on advancing/supporting it. It's not hard to imagine Windows stays a very dominant client OS for a long time to come - even if the overall PC market share continues to decline, because none of the alternatives are there and nobody is going to invest the resources to get them there.
I will also add that Satya's success lies in speeding up this strategy that started late under Ballmer and also in executing so well on it. Considering the scale of what MS is doing - Office ports to iOS, Android, Windows 10 releases, Azure, ton of other Enterprise stuff (Exchange, O365, Development tools, cross platform stuff like .NET Core, VS Code etc) - the change of course and the success they are having with it all - you can't argue it's not a phenomenal achievement.