Have you ever heard of PC-over-IP (PCoIP)? PCoIP is a presentation protocol (much like RDP or ICA) introduced by Teradici. The difference in PC-over-IP is that it utilizes hardware chipsets on the server and client. This technology enables centralized desktops and supports high definition audio and video, transparent USB support, web cams, Bluetooth, VoIP, scanners, printers (including multi-function), etc. This technology can also be used in a VDI environment as well as Dan Shappir explains in a nice blog post.

Check out this image from a virtualization demonstration involving multiple monitors:

Technorati : ICA, PC-over-IP, Presentation Virtualization, RDP, Teradici
Del.icio.us : ICA, PC-over-IP, Presentation Virtualization, RDP, Teradici
Ice Rocket : ICA, PC-over-IP, Presentation Virtualization, RDP, Teradici