Remote desktop group is missing in remote tab in Windows 8

Under Windows 8 (latest Windows 8 Release Preview) System properties → Remote, the "remote desktop" group is missing.

This group is where you define which RDP clients are allowed to connect to your system. This anomaly prevents me from defining a RDP host on this machine.

I am looking for the cause of this thing. Any ideas?

From http://en.wikipedia.org/wiki/Windows_8_editions :

Windows 8 Pro is comparable to Windows 7 Professional and Ultimate and is targeted towards enthusiasts and business users; it includes all the features of Windows 8. Additional features include the ability to receive Remote Desktop connections

This means that the windows 8 version (non pro) is unable to receive RDP connection.