If we must compare games, then only source material should be compared.
That YouTube video compare is like saying vinyl and 128Kbps MP3 is the same quality of music as long as we listen to them through iPod earphones.
When you have 4K native with HDR with accompanying textures; it's disengious at least in my opinion to downconvert to 1080p without HDR and say this is the product.
It's clearly not. you need a 2px line thickness on 4K res to scale down and show up as 1px on 1080p. Anything else is just lost.
Just consider how much detail you're missing here as a result. It's no different than playing a game with lineskip and saying the game looks awesome because you can imagine the detail in between.
So that's all I'm going to say about that.
There are a lot of things I would consider next gen, lighting and shadows are certainly one of them, one thing I didn't expect was higher resolution texturing and 4K. I needed to see it in person to believe it and after seeing it triggered me to buy into 1X.
So while I get everyone loves and respects the next gen lighting provided by DC. If you can't see the level of fidelity that F7 has in 4K with HDR, you're just sort of writing that entire piece off ignorantly (unintentionally though), which is a big part of what makes 4K gaming awesome.
If I were to make an analogy of what your missing:
Probably not nearly as dramatic. But the idea is similar. You don't know what your missing until you've seen what you've been missing. A standard 1080p set/video is incapable of showing people 4K native with HDR.
Anyway, carry on.