Here are two more pictures, this is almost complete. I moved the cables to come out between the rails - should have put them there to start with. The power cable for the track lighting is staying on the outside of the rails, though.
I connected the tank tread track used to hold the HDMI cable to the ceiling between the rails. I zip tied the power cord to it, ensuring that when the HDMI track slides the power cord will not touch anything. I did this to keep a physical seperation between the power cord and the HDMI cable. If it has to be seperated in a wall, I figure they should also be seperated in a moving track.
The only things I have left to do are to cut off the extra length of the bolts stucking down and put up the metal covers (which will be painted black) to hide it all, as well as putting the outlet plug on the end of the power cable. I will wait and see if I need to use the brushes or not.
I am waiting on an HDMI extension cable, once I have that I will install it and zip tie the power cable the rest of the way along the track holding the HDMI cable.
Then comes the TV and success.
Here is a close up of the system used to hold the HDMI track and power to the ceiling. It is a long wood screw with a support bar on it. It holds everything tight against the ceiling. I will use four of these, spread evenly along half the length of the HDMI track. Since the HDMI track folds in half when the TV is in the middle of the room, it cannot go further than that (I only have three installed in the one picture). The other half will lay on the inside lip of the cover which is yet to be installed. The HDMI track is designed to take a good amount of abuse, so it would take centuries of movement before it will ever see damage from rubbing. The power cord, being zip tied to the HDMI track, will not rub against anything.