Apple TVs running tvOS don't present a meaningfully better product offering than either Amazon FireSticks or Google Chromecasts, both of which sell at roughly an order of magnitude cheaper. Moreover, TV devices are neither positioned nor optimized for general computing.
The Vision Pro sells at an order of magnitude more expensive than most AR/VR devices and we don't know yet if the product will be meaningfully better than the offering in 2024 when it's supposed to be released (a full year is a pretty long time in the computing field, IMHO)
VR devices are also not optimized for general computing (as a sign of it, the Vision Pro won't natively support mac apps either)