If an app is a windows store project created in blend - VS2013 pro (xaml/C#), which devices/OS will it work on?

Hi,

I am trying to get my head around what platforms we can deploy to using Blend for VS2013 using C#/XAML technology.  We are comfortable developing sliverlight apps, but we want to look to the future and migration paths.

Using Blend - XAML/C#, it appears that deployment to windows store is pretty straightforward. 

But what about windows phone and windows tablets.  Win RT?  Can we us Blend C#/XAML to deploy to those platforms?  In a nut shell, If an app is a windows store project created in blend VS2013 pro (xaml/C#), which devices/OS will it work on?

I know my question is very basic and vauge, but any help would be great (we are new at developing native windows apps, and any help would be great).

Thanks,

-Adam