HyperV as Hypervisor is supported in 4.3 release.
For 4.4 release following features will be supported.
VPC support on Hyper-V Hypervisor
FS for the feature : VPC support on Hyper-V
FS of the feature Multiple Nic Support
FS for the feature: Network throttling for virtual machine on Hyper-V
FS for the feature: Zone wide primary storage for Hyper-V
FS for the feature Storage motion in Hyper-V