I can confirm that VT-d pass-through appears to be working just fine with the new ASRock Z87M Pro motherboard. I don’t have a need for it just yet but all the options appear to be available and it’s showing as enabled in the BIOS.
The internal SATA isn’t showing up on the list though, it could just be because I haven’t got any devices plug into it. I haven’t had the time to verify but if someone else has, please drop a comment below.
And my USB devices were able to passthrough without incident as well.