"Dumb TVs" would cost more. It's hard to market something that costs more and has what most people would perceive to be fewer features.
They would cost more because post-sale content sales and advertising generate revenue for TV manufacturers, which they use to subsidise the device sale price, because it's such a competitive, low-margin, market.
They would cost more because post-sale content sales and advertising generate revenue for TV manufacturers, which they use to subsidise the device sale price, because it's such a competitive, low-margin, market.