If you mean the Windows Desktop platform then I don't agree. That platform is simply not viable any more. A normal user can't do basic stuff like download a free game and play it like on iOS or Android. Installing anything (even from reputable sites) will infest a Windows PC with viruses and spyware.
Windows Store Apps don't have this problem, but the Windows Store has very few quality apps and is lacking in many areas. That must change for Windows to survive.