Hello,
As far as I can tell the following features fully work: HVM, IOMMU. I don't know if TPM works or not (haven't tested it).
As far as machine compatibility goes I haven't tested sleep and suspension/hibernation. I also haven't tested the on-board nvidia GTX 970M for compatibility with Qubes. Networking works, both wifi and ethernet.
If there's any more information I can provide -- aside from an HCL.cpio.gz file please tell.
Yours,
AzureNotes