Hi Venkatesh,
I don't think there is such meta tag for windows 8. Windows 8's IE 10 explorer has desktop and touch modes. When using desktop mode, it is just like traditional windows 7 IE9, while for touch mode, the menu and navigation bar is automaticaly hidden, only
when you use gesture or right mouse click to show it.
For your scenario, you can consider using <iframe> to display external pages in your windows store app.
#How to link to external web pages (Windows Store apps using JavaScript and HTML) (Windows)
http://msdn.microsoft.com/en-us/library/windows/apps/Hh780594.aspx
However, we should not build a windows store app which purely uses <iframe> to show external web pages/web sites (it's ok to use external pages as part of the APP UI and features).
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