All of my TVs don't have anything plugged into them except an Apple TV.
Based off your post, you didn't read mine very well. I listed a bunch of reasons to use tvOS, and I also addressed everything you mentioned.
I just think that people shopping for an ATV should go for the ATV4K and not the ATV4 unless they can get a really good deal on the ATV4.
Besides, just because the ATV4 has a better/newer A-chip in it than the ATV3, doesn't mean that it wasn't underpowered at launch. The ATV3 uses a very basic and simple UI, and the A5 chip is perfect for what it does.
At launch, the ATV4 got a chip that was already a few generations old, the rumors were that the ATV4 was to get the A9, or at least the A8X that was in the iPad a year earlier. Instead, it got a much older (for tech) chip.
Now, compare that to the ATV4k's A10X Fusion chip at launch. The ATV4k was done right. Even, with the huge improvement of hardware over the ATV4, it only costs $30 more.