SPICE: new Windows Guest Tools - 0.74

I already use those since they were launched and have no problems on W7-x64 guest. It actually improved the performance of the guest ( I had some apps
with some dynamic graphs that made the console unusable and the reported cpu usage from kvm being very high, although the guest didn't report the load )
 
I know its not a proxmox issue but I worry about spice/virtio support for Win 2012, 2012R2, Win 8 & 8.1

Redhat is quite opaque in its development process and plans here and I don't have a lot faith that they see it as a priority.