I just mean that everything into the TV via hdmi and then out to the bar via hdmi should allow the sound bar to read the TV as "one device" feeding it an hdmi signal weather that means the picture and sound is from the antenna, TV, blu ray player, etc. Having just one hdmi input on the sound bar would support this idea (who among us just has 1 hdmi device!), but maybe that is just too easy... Not to mention the added functionality of ARC.
No one answer here, just a thought for discussion if you want to weigh in.
Thanks for the answer on the 2 v. 5.1 question, great info!