I don't disagree that manufacturing costs have gone down, but I question whether that or ads, data collection, and other new smart "features" have most contributed to the lowering price of TVs and other electronics. Note, the reporting referenced are over 5 years old... before AI really took off and the demand for every scrap of data became so profitable.
https://www.howtogeek.com/767919/tv-manufacturers-make-more-from-ads-than-selling-tvs/