My wife's PC has Windows 7 Home Premium on it. I ran the Windows 8 Upgrade Assistant on it, and it suggested that I could upgrade it to Windows 8 Pro. I didn't think that was possible; I thought that it could only be upgraded to WindowsRT or maybe Windows 8. Am I wrong?
WindowsRT is for Tablets based on ARM architecture.
That means you can not get WindowsRT for your PC, only Windows 8.