I emailed lg regarding the B6 as mine coming on Thursday 
Hi
I hope this email got to you safely and thank you for your query.
I’ve looked into this for you personally and hope that I can be of assistance. We have been producing the HDR Game Mode for our 2016 models recently, however some models still haven't received this update - including the OLED55B6V. This is not to say that is won't receive it, I can only presume it will considering it is a 2016 model. I cannot guarantee that it will be released, but I'd advise to continually check for software updates both on your TV and also on our website.
If you have any further queries, then please do not hesitate getting back in touch , as we are more than happy to assist.
I hope my email has answered your query and assisted you today; I would really appreciate your feedback. Please help us to improve our customer service by completing the short survey after this email.
Thank you in advance.

Hi
I hope this email got to you safely and thank you for your query.
I’ve looked into this for you personally and hope that I can be of assistance. We have been producing the HDR Game Mode for our 2016 models recently, however some models still haven't received this update - including the OLED55B6V. This is not to say that is won't receive it, I can only presume it will considering it is a 2016 model. I cannot guarantee that it will be released, but I'd advise to continually check for software updates both on your TV and also on our website.
If you have any further queries, then please do not hesitate getting back in touch , as we are more than happy to assist.
I hope my email has answered your query and assisted you today; I would really appreciate your feedback. Please help us to improve our customer service by completing the short survey after this email.
Thank you in advance.