Hey Doug that is great feedback. Concerning the "PC In" mode or physical connection, I know that TVs do a lot of digital processing of signals and naturally for photos none of it is needed. In other words, I just want pure representation of my jpg or tif on the OLED panel. I have seen LCD TVs in the past have dedicated PC In hardware inputs which I "presume" bypasses digital processing.
As a side note, with digital photography being so popular today (I'm a serious photographer and 20 years ago few tourists were seen with any serious equipment whereas today, everyone is toting around equipment and taking copious numbers of photos), I am amazed that TVs are not marketed to also address this secondary user market. With the Trillions of digital images snapped every year, where the heck does LG or Sony think the images are being viewed and shared? I can find precious little material about using HDTVs for photo slideshows!
The reason I posted this thread is that I recognize that video and still photography are technically two different animals wrt most aspects of visual display... yet it is not addressed in literature.
For those who may be interested, I discovered that the video color gamut DCI-P3 is of similar size to adobe RGB... but that DCI-P3 provides better red spectrum coverage at the expense of the green spectrum. This has something to do with the nature of Hollywood film. As a photographer, greens are more important to reds and so these new DCI-P3 monitors are not necessarily giving photographers all that they could. However, DCI-P3 is an improvement to the sRGB color space, so in general one is getting a much better color depth capability on a tv today than they were some years ago. And, for the vast majority who shoot in 8bit sRGB jpg, you're now missing out of a richer and fuller color space. I shoot in raw and work in the 16bit prophoto RGB color space - which is a color gamut way beyond what monitors can display. In a nutshell, 8 bit color space is disappointing, especially with greens, and these new tvs offering 10 bit DCI-P3 color space is a welcome advancement, albeit they are still far from what the human eye can process... meaning one's photos when displayed on a monitor or tv don't recreate the vividness of what one remembers seeing.
Also note that browsers still work in 8 bit sRGB... so for those posting photos online, it is best to use an 8 bit version of the image. Basically today I must keep various files of the same image: 8bit sRGB, 10bit adobe RGB (but now maybe DCI-P3 instead), CMYK, and 14 to 16bit photopro RGB... all in addition to the raw file.