title: How does Windows 8 Runtime (WinRT / Windows Store apps / Windows 10 Universal App) compare to Silverlight and WPF?
body: <p>I am trying to get my head round the new Windows 8 Runtime that is used to create <a href="https://en.wikipedia.org/wiki/Metro_%28design_language%29" rel="noreferrer">Metro</a> style apps. I know you can use it with <a href="http://en.wikipedia.org/wiki/Extensible_Application_Markup_Language" rel="noreferrer">XAML</a> and it is based on .NET so C# and VB.NET can be used to write the apps, but then it seems to have something to do with HTML, CSS, DOM, and JavaScript.</p>
  
  <p>Can someone explain what it is in a few paragraphs, in terms that a .NET UI programmer can understand? (I am missing something “key” that is necessary to understand it.)</p>
  
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  <p>We all know that WPF, <a href="http://en.wikipedia.org/wiki/Microsoft_Silverlight" rel="noreferrer">Silverlight</a>, <a href="http://en.wikipedia.org/wiki/Windows_Forms" rel="noreferrer">Windows Forms</a>, etc. will keep working under Windows&nbsp;8 (and Windows&nbsp;10) on at least on Intel systems, so please don't tell me that...</p>