I'm not as sure as you that it would work out that way.
Let's take your TV example. I bought my TV from the local store, or Amazon, or perhaps second hand from some random guy on ebay.
Naturally I connect the TV to my home wifi, use the built-in Netflix app etc.
Assume I'm like your aunt. I barely have the skills to plug it in, much less read the code.
In this scenario is it OK that every previous owner, distributer, retailer, had the ability to add to, or change, the code in the TV? Do you think a highly skilled person, such as yourself, can audit the code to see that nothing nefarious has been added?
Today I have "limited trust". I have to assume Samsung is gleaning at least some data from my TV. But I'm reasonably sure it doesn't have malware on it.
In your hypothetical future, can you be as sure?