Haswell HD4600 graphics support

[Arthur Chance]

[I'm not sure whether this should be on -questions or -x11, so I'm 
starting with the more general mailing list.]

I'm getting a new box based on the Devil's Canyon i7-4790K CPU, which 
has Intel HD4600 graphics built in. I intend to install 10-STABLE on it. 
Everything I can find suggests that there's currently no support for 
Haswell graphics in the X server, even with WITH_NEW_XORG defined and 
vt(4) used instead of sc(4). Is there an estimated time of arrival for 
such support?