I have a RPi with a Sony TV, CEC works on that (XBMC 12.2). I also have a NUC (i am testing is now for the same reason, speed and need a PVR card), my NUC is DCCP847DYE, its the slowest, it plays movies fine (tried 2 so far), however CEC doesnt work with the same TV, cable and remote (as it did with the RPi).
I am not happy to by more hardware when a $40 item can do all this and the setup was 10 times faster, dont want to buy any more hardware, think i prefer to wait on the RPi than "upgrade" to something 10 times more expensive and have to buy hardware.
Will keep you posted if i get this to work.
UPDATE (taken about 1-2 hours mins to find this).
INTEL
::: IT WILL NEVER WORK :::
Intel HD Graphics doesn't support CEC, see below link:
Intel HDMI details
Click "What are the differences between different HDMI versions?"
About halfway down "Consumer Electronic Control (CEC) - Note Intel graphics do not support this feature."
NICE ONE INTEL, way to go supporting an industry standard !!!
FOXCONN
Foxconn make a line of "nano PC", some are Intel (same problem as above, as there Intel Graphics), however they do another line of AMD units (
Foxconn Brazos, i have no idea what video these are, but will look in to it.
Ive sent an email to Fozconn to ask, however from what i read none of the Radeon series of cards seems to support CEC!
ZOTAC
ZBOX doesnt seem to support CEC either (at least at March 2013 anyway).
nVIDIA
nVidia developer forum
Doesnt seem to either and have no plan to in the future (November 2013)
CONCLUSION
Dont use a PC for a media center, Raspberry Pi here we come!