PC's are... I won't say irrelevant to Microsoft, because they are not.
But Microsoft now has a much much larger play field then when they were Windows only.
Now they are an OS provider on PC, Tablet and Phone, They have Azure, Bing Maps, Bing Search, Xbox, Xbox LIVE, Office 365, Surface, Windows Phone, Windows Store, SharePoint, SQL Server, Visual Studio, Outlook, Skype...
I could go on for a while, but I think I got the point accross of the scope Microsoft does business on.








