Nvidia VGX will allow desktops hosted on servers to take advantage of server-based graphics processors beaming rich, workstation-class graphics to handheld devices, netbooks, and tablet computers.
With Hyper-V, the benefit is that your IT organization can use their existing knowledge, server infrastructure, and applications in a virtualized environment while taking advantage of the efficiencies the technology provides.
Even Microsoft is getting into the game with its Parallel Data Warehouse (PDW) that enables SQL Server customers evolve their SQL databases to Massively Parallel Processing (MPP) architecture to take advantage of commodity hardware.