New! Browser-based access to Windows Applications & Desktops on Terminal Services / RDS / VDI.  NO software installation or plug-ins required on the end-user's device! Ericom AccessNow is so simple to use — all a user needs is an Internet-connected computer running an HTML5-supported browser (i.e., IE*, Safari, Firefox, including from Chromebooks). 

It's approximately a year old but it's still a great video demo anyway of Brian Madden testing Citrix's ICA protocol, Microsoft's Remote Desktop Protocol and Redhat's SPICE protocol (previously by Qumranet).

It becomes obvious near the end that SPICE is very heavy on bandwidth coming from the server and ICA beats RDP for both CPU and Bandwidth consumption.

http://www.brianmadden.com/blogs/gabeknuth/archive/2009/06/18/redhat-spice-vs-rdp-vs-ica-performance-video.aspx