No they don't. At the highest they are 1.3 compliant.
So, I'm confused. Do any DirecTV reciers have HDMI 1.4a compatible outputs? Is that somethign that can be changed with firmware or is it hardware? If the DirecTV boxes are not 1.4a compatible then how is any of this even an issue? Personally, I think 3D won't be sucessfull in the long run, but if I was looking, this kind of confusion would also drive me to reconsider that.
However, the 3D portions of the 1.4a specifications are software based and not really hardware based. As far as a standard high speed HDMI cable is concerned, 1.3 and 1.4 are identical.
For example, the Ethernet over HDMI or the Micro connector cables are physically different from the standard high speed cable and would require the new 1.4 compliant HDMI chip set, but the implementation of 3D only relies on the high speed HDMI. In the case of 3D, 1.3 is equivalent to 1.4 (beyond 3D is another story).
Edited by Mike Bertelson, 04 August 2010 - 11:38 AM.