7.1 Channel Surround Headphones for Blu-ray/4K Player

[ajy0903]

Info before I ask: I'm living in USA right now.

In year 2012, I have asked this questions:

Are there any headphones that support DTS-HD/MA, DolbyTruHD or any Blu-ray capable?

Now we are in year 2017.

Maybe I thought since it's 2017, I was wondering if the situations with headphones became much better.

Now I see there are stuffs Like:
- DTS:X Headphones
- Dolby Headphones

Are they actually selling headphones that have those above technologies?

Now that I have purchased LG UP970 4K UHD Player, I now again think about purchasing Headphones for it. This player has 1 HDMI (Video & ARC), HDMI 2 (audio only), and optical out.

Things I can't do:
- Can't purchase and use external speaker: I live in the apartment.

Things I have or use:
- Regular 1440p PC Monitor as display to watch 1080p blu-ray using LG UP970 4K UHD Player.
- LG UP970 4K UHD Player

And as long as there is optical connection on headphone/headset, I can use it with 4K UHD TV or any TV available?

I just found this, "Katana 7.1 HD Wireless Headset". Does it still selling in retail store?

Of course if I had been living at either Asia or UK, I would have bought "HW700DS" or "MDR-DS7500". But since I live in USA I can't.

Also, if I can't find any solution, then I might going to buy actual 4K UHD TV. Is there way to listen full features of Dolby Atmos/DTS-HD MA/Dolby TrueHD/etc using headphones?