Comment Audio is different (Score 1) 197
I'd say that we won't know the answer for a while more, provided Dolby don't ditch the tech before that. Firstly, humans are generally much more visual than auditive: a brand new TV set with vivid colors, large contrast and a sharp image will be a much easier and more obvious sell/upgrade than a new sound set. Not only are we better wired to notice the difference, it's also much more easily demonstrated in a shop, whereas a sound system normally needs a closed room with not too horrible sound properties to work well. On top of that, you can buy speakers individually, or in a pack with the receiver. Finally, lest we forget, most people will have one "home theater"-style room, be it the living room or a dedicated room just for movie watching. While they might buy a new TV for another room in the house, just about nobody will buy a second sound system.
The end result is that people upgrade their sound system at a much slower pace than the rest of their home theater setups. For instance, we've had the same speaker setup for something like 15 years. The speakers themselves don't really age (they'll eventually degrade, but that's about it - there isn't as pronounced a difference in tech as with TVs where you could get 2x better sound for the same price within a few years), so there's no point in changing them, and therefore we don't really think about changing the receiver itself. It's old enough that it doesn't have HDMI. It doesn't support Dolby True HD or DTS HD. Atmos is pretty much the equivalent of OLED TVs to us - it sounds neat, but not enough to be worth the investment.
The end result is that people upgrade their sound system at a much slower pace than the rest of their home theater setups. For instance, we've had the same speaker setup for something like 15 years. The speakers themselves don't really age (they'll eventually degrade, but that's about it - there isn't as pronounced a difference in tech as with TVs where you could get 2x better sound for the same price within a few years), so there's no point in changing them, and therefore we don't really think about changing the receiver itself. It's old enough that it doesn't have HDMI. It doesn't support Dolby True HD or DTS HD. Atmos is pretty much the equivalent of OLED TVs to us - it sounds neat, but not enough to be worth the investment.