[Users] desktop virtualization and GPU support

Hi, Currently we have a customer who would like to migrate to a thin-client virtual desktop environment. What is the status for GPU support in ovirt? Is 1:1 or 1:4 possible, where we'd attach a single GPU to each VM or one GPU to 4 VM's like in Citrix of VMWare? If we don't add GPU's will the desktops be usable at all? Thanks in advance, Jorick Astrego Netbulae B.V.