So you mean that both the ARM and x86 versions will have the same name - "Windows 8"? I highly doubt that. People will be confused about software and hardware compatibility. Remember the "Vista Capable" chaos and all the lawsuits?
No. It is obvious they have to change the name, dont you think? I know Windows 8 is a great name, but if you think about it its a useless name. Predecessor of this OS was named Windows 7. So Windows 7 to Windows 8 evokes the idea of a simple evolution. But Windows 8 is a revolution. Its the reimagination of Windows so the name of the OS has to be clear about this change.