You post this same thing over and over. The hardware must come out first. It makes no sense to put 4K videos for

TV in the store before there are lots of 4K

TVs in homes. If everything in the store was made available in 4K for

TV today, what would happen? Nothing. Why? Because with no hardware to play it, there's no purpose in it being there.
Hardware must lead. 4G phone hardware drove infrastructure to catch up. Look where we are now. However, if 4G phones had to wait until all cellular networks everywhere were upgraded and ready for it, we'd still be waiting on 4G phones.
Technology doesn't go well with a "good enough" mentality. It's advance or be overrun. If you are happy where things are, good for you. Don't buy any new technology. But other people want to move along. There's not a single app in the iOS app store that can take advantage of A10. So I guess Apple shouldn't bother building new iDevices with an A10 next year. Just stop developing any new hardware until all software is updated to take full advantage of something that doesn't exist yet.
Once again, let me remind you that
Apple embraced 4K yesterday by launching iPhones that record 4K and touting iMovie to edit 4K. They just left it out of this ONE product.