I received my TV Friday morning. I've spent a weekend tweaking and enjoying what I can only describe as "better than I expected" picture quality viewing experience. I never knew or cared about picture quality (PQ) until I found this site about 10 years ago. In 2012 I bought what I considered to be the best picture quality for the buck at the time - a Panasonic 55" ST-50 plasma. Ever since I've compared all others to that one, but truthfully I haven't bought a TV since then, so all others would be in review sites and in-store experiences. I spent weeks and weeks (months -- shh don't tell my wife) on this forum prior to that purchase in 2012, and I told myself I would never do that again.
Now here we are in 2019. I finally own my house and the big living room was in need of a big screen. I only spent about a week researching TVs and found this 75R615 to be the 2019s version of best PQ for the buck/size based on reviews and articles. I am here to report, after a weekend with this TV, I am impressed by how far the technology has come in the last 7 years. I really like the PQ on this TV. I am a cable cutter and that played a big factor in selecting a Roku set with a tuner for over-the-air channels. Keep in mind I dont even own a 4K player and may not even get one. Below are my findings based on content/source.
Over-the-air : I watched NBA playoffs and golf. Motion was not as good as my ST-50, but I knew this going in. The 'upconversion' or whatever happens to an over-the-air source on the TV, leaves a lot to be desired. I would never show off this set with over-the-air content. I thought this type of source would look better, but I guess 1080i and 720p on a 4K tv has its limits. I played with motion settings and picture settings - it helped a bit, but was still behind the plasma in the motion department. However, in color and brightness, this set does fairly well. In a couple of camera panning shots during golf, i did noticed a couple (maybe 3) darker areas running vertically on the screen - maybe that is what's called DSE? (not sure) -- but like I mentioned before, not going to test for this UNLESS it becomes an issue during regular viewing. So far, I can barely see it, but it's not football season yet.
Streaming Game of Thrones (HBOGo) : This app is notoriously known for bad PQ, however after watching S8E4 (NOT the Long Night super dark one, I didn't own the TV yet) I was impressed at how well the TV handled the blacks, the colors, the brightness and the resolution. Even my wife commented how good it looked. So good, in fact, that I researched to see if HBOGo had gone 4K - which according to most the answer is no. But I could have sworn seeing the Imp's beard and clothing threads we were watching something close to 4k. The blacks on this set are better than my plasma - now that could be because the plasma is 7 years old, but I had never experienced what a FALD set could actually pull off while at the same time being so bright. I can't imagine a $3k-$4k OLED would justify the price difference.
Streaming via WiFi Jack Ryan 4K HDR (Amazon Prime) : WOW! I had never experienced HDR before last night. Now, I am still not sure exactly what it does or does not do, but this content looked the best on this set. Once the set recognized it was an HDR show it automatically changed the picture setting to "Dolby Vision" and the blacks, colors, and brightness were so good, it exceeded my expectations. I imagine I will look for 4k HDR shows and will watch them even if they are so-so just because of the PQ -- no lie.
Blu-Ray of WALL-E (actual disc via a Panasonic BR Player) : Not bad, not great. This was 1080p upconverted to 4K so I wasn't sure what to expect. The colors were fine, but the resolution left something to be desired. I am beginning to learn that given the choice of any content on a 4k TV - I need to choose 4k. DUH! - you might say, but this is my first 4k tv and my first screen bigger than 55".
I've never paid anyone to calibrate a tv and don't foresee me doing it this time either. I copied rtings 55" numbers just for the heck of it, but I would like for one of you guys to post yours. I find myself switching between the presets based on what I am watching - sports, movie, normal, etc.
I hope you guys find this helpful. I am happy with my purchase. The only thing I may 'upgrade' is the remote - assuming the 75R617 or any Roku WiFi/Voice remote works with this set. DO THEY??