In order to deploy Windows Store Apps in Window RT(Windows on ARM), a new operating system for thin and light PCs OS,
you need a Surface PC. Because Windows RT comes pre-installed on PCs and tablets that are powered by ARM processors.
Moreover, you have to build it separately by selecting ARM as a target architecture.
A Windows Store app is a new type of application that runs on Windows 8 devices containing Windows Runtime(WinRT).
So it is supposed to deploy any environment like Surface for Windows RT where Windows Runtime available.
Windows Runtime(WinRT) is a platform-homogeneous application architecture on the Windows 8 operating system.
The Windows Runtime library (WinRT) provides system services for Windows Store apps. WinRT applications natively support
both the x86 and ARM architectures, and also run inside a sandboxed environment to allow for greater security and stability.