I like the idea of fiber, but unless you are into terminating the ends yourself, the conduit must pass the ends and you must be able to pull the factory ends through the conduit without breaking anything. The FIOS guys routinely pull factory ends through otherwise empty conduit. They first pull a tape that will give an exact length, then fetch an appropriate factory cable from the truck.

You could use two conduits with boxes above the concrete pad, then install an overall "wrap" that is large enough to cover the boxes and the post. You could use a prefab cylinder or have a sheet metal shop roll one for you. Or, depending on the decor, a brick or wood "wrap" might be appropriate.

NEC code or not, I don't think that a power cord extended through the conduit would work out because at some point you may need power at the TV end for something else -- such as power for the CAT BALUN or fiber terminator. This could also be a nice location for a WiFi access point.