In the blog post he discusses:
- Transport changes to enable the WAN improvements in Remote Desktop Protocol (RDP) 8.0
- Management console changes to facilitate using these new protocols
- IIS configuration changes
- Load balancing changes to complement the new protocols
Source and full blog post: http://blogs.msdn.com/b/rds/archive/2013/03/14/what-s-new-in-windows-server-2012-remote-desktop-gateway.aspx
