In this we agree. Apple was relatively early with

TV1. And they have not exactly been pinched for cash to be able to outspend anyone promoting it. Nor have they lacked the money and resources to out-Roku a Roku in terms of lining up content partners. If you want to assign fault, clarify it: Apple basically ignored a great product and allowed the other guys to build upon many good ideas in

TV1. They should be way out ahead right now but are- in may ways (IMO)- playing catchup... not because the competitors are richer or have more resources... but because (IMO) the competition is focused on doing this particular thing as good as they can on less-to-much-less (than Apple) money & resources. Apple is distracted away from this and seems to have trouble assigning dedicated talent & funds so that it can do more than a few things at any given time.
While there's some truth to that, read through this very thread and you'll find several people who have not bought one because- they say- they want 4K playback. Sure this thread is not representative of all people but I bet there's more than just these few people in this thread that feel that way. Is it the ONLY reason? Of course not. Is it A reason? Yes it is. Proof can be found in this very thread with only a handful of people participating in this conversation.
People buy a 4K set. They want to feed their new toy 4K video. This

TV can't do that. Pretty much all of the other players have one that can. Should all of them call 4K a gimmick and buy the one and only good streaming box? Or should they buy whatever they want to buy with their own money? I can't fault 4K TV owners or buyers for not wanting to buy an

TV that can't feed their set 4K. From their perspective, that limitation might make the whole thing look like yesterday's technology... and/or have them expecting an impending "5" that will bring them what THEY want (too)... so they wait.
That's crystal clear in every one of these

TV threads when this debate pops up. However, I never see you in all of the other threads bashing Apple for embracing 4K in just about everything else they make. Apparently, it's just "silly" to desire it here- in this
ONE Apple product not already embracing 4K. Where are you to rip into Apple for making phones that shoot 4K, iMac 5K screens for editing 4K, iPad Pros for editing 4K, FCPX and iMovie for editing 4K, Quicktime for containing it, iTunes for storing it? Apparently, that's all fine. It's just "silly" here... in this ONE thing.
...for you. Some don't give a hoot if the networks EVER broadcast it. I certainly don't, so my opinion about that topic should cancel out yours. Networks are not broadcasting 1080p either but that didn't stop Apple from rolling out a 1080p box. If broadcasting is the standard, Apple should not yet have a 1080p

TV either. But, since they do, I know that is perfectly fine... just as a 4K version will be as soon as Apple rolls one out.