I suspect it's not quite that simple. First, is there actually enough demand for ad-free TVs to make the option worth including? I personally probably wouldn't pay $20 to avoid ads in the home screen since those kind of ads are just a minor nuisance, which makes me question the size of the market for the ad-free option.
Second, what would the pricing be for the option?
If it's $10-20, that'd probably be fine, similar to what Amazon did for Kindle. But if it's more than that, then I bet the negative PR they would get for including the option outweighs the potential benefit to customers. "I would never buy an X, they're extremely greedy and want $50 just not to show ads. Crazy. I'll buy Y brand instead (which has ads but no 'corporate greed' option to not show them)".
Second, what would the pricing be for the option?
If it's $10-20, that'd probably be fine, similar to what Amazon did for Kindle. But if it's more than that, then I bet the negative PR they would get for including the option outweighs the potential benefit to customers. "I would never buy an X, they're extremely greedy and want $50 just not to show ads. Crazy. I'll buy Y brand instead (which has ads but no 'corporate greed' option to not show them)".