Is it possible to use Delphi XE5 or RAD Studio XE5 to create apps for Windows 8 RT (ARM based tablets) and Windows Phone 8, using the same code (Firemonkey) as for Android and iOS?
I searched Embarcadero's website on windows development but it goes a long way to avoid mentioning Windows 8 RT and Windows Phone 8. It states that
Your apps will run on Windows desktops and x86 based tablets with Intel and Intel Atom hardware such as Microsoft Surface Professional, Slate tablets from HP, Asus and others, as well as AMD processor based tablets from Acer, Samsung and more.
Does this mean that Windows 8 RT and Windows Phone 8 are not supported by Delphi/RAD Studio XE5?
Delphi XE5 cannot produce apps that run on WinRT or Win Phone 8.
Work is being done on Windows ARM/RT, Linux Server, TBD.
Take a look Embarcadero RAD Studio Roadmap
http://edn.embarcadero.com/article/42544
To confirm David's accepted answer, I just received a response from Embarcadero support:
Yes, you are correct we DO NOT support Win8 RT or WinPhone8 with Firemonkey. We have not seen a huge demand for these platforms, if there is an increase in demand they might be support, but at the moment we are not supporting them sorry.
So it does not sound like they have any plans to support those platforms in the near future.
来源：https://stackoverflow.com/questions/20901208/can-delphi-xe5-produce-apps-for-windows-8-rt-and-windows-phone-8