The LG OLED EG9100 TV has really excellent picture quality and has even improved compared to the last generation OLED EC9300. However, it still shares the same big flaws, poor uniformity with dark colors, and the screen's brightness varying, depending on the scene.
While the top part of the LG 55EG9100 OLED is very thin, the bottom section is of average thickness. The borders are really thin. The back of the TV is cream white. The stand is stable and relatively small compared to the current trend of wide stands, so you won't have any problem fitting it on most tables.
OLED TVs really excel in picture quality, and the LG EG9100 is no exception. The blacks are perfect; the pixels don't emit any light, resulting in an infinite contrast ratio. It also has fancier features like motion interpolation, 3D, and even a wider color gamut. It deals well with reflections and picture quality remains good even when viewed fron the side. Unfortunately it doesn't get very bright.
As with other OLED TVs, the LG 55EG9100's luminosity changes depending on what is displayed on the screen. This is called ABL (Automatic Brightness Limiter) and it cannot be disabled. When a small white square is displayed, and with 'OLED Light' to the max, it is able to attain a brightness of 336.4 cd/m2. However, it cannot maintain that luminosity on a fully bright screen - it drops to 80.63 cd/m2. More on this here. For HDR, what this means is the luminosity of the highlights will change drastically depending on the scene.
The colors are more uniform than on an LED TV, but they're still not perfect. 50% gray and brighter is quite good, but things get uglier the lower the brightness gets. The TV also suffers from temporary image retention. More on this here.
The viewing angle is really great. Unlike the LG 55EC9300, it doesn't get a yellow tint at a wide angle.
Update 01/06/2017: We have changed the methodology of testing. Since this is an old TV which we don't have anymore, we extrapolated the results from 2016 TVs.
The uniformity of pure black is perfect. However, with dark colors that are even a bit lighter than pure black, the good uniformity goes away (more on this here).
It does a great job at cutting reflections, but the screen finish is glossy and it has a purple tint. The curve creates a lens effect that zooms in on the reflections, so you will want to avoid having a lamp or window directly in the reflection path.
The maximum luminosity varies depending on the scene. Usually, this isn't an issue, but when displaying white on 50% of the screen, the maximum luminosity is not as high as on an LED TV.
This LG is really great at handling motion There is absolutely no trail following moving objects. It is able to interpolate motion for those that like the soap opera effect. Movies from a blu-ray player or the in-built apps play smoothly.
The response time is perfect, and unlike the EC9300 that we tested, it doesn't have any overshoot. It doesn't flicker though, as you can see in our "backlight" measurement. Some people don't like the look of flicker-free motion. You can read more info about the motion blur on OLED TVs in the 'Additional Review Notes' of the review of the EC9300.
The input lag is average, but still not noticeable for most people. It is a 1080p TV and so doesn't support higher resolution inputs. It supports chroma 4:4:4 for sharp text.
Labeling the input with the PC icon brings the input lag down to 43.5 ms on the LG 55EG9100. Game mode has a slightly higher input lag of 52.4 ms.
Update 07/25/2016 We've received a report that the input lag is now 29.6 ms after the firmware update 04.01.00. We don't have that TV anymore to confirm this unfortunately.
The sound is pretty accurate, and doesn't get very distorted. Unfortunately, it can't get loud, and the bass is poor.
Note: Sound Quality test for TVs reviewed before 2017 was performed at 75dB, 85dB, and Max SPL. Starting 2017, the target SPL levels have been changed to 70dB, 80dB, and Max dB SPL.
It features LG's WebOS smart platform, which is great. The remote can even be used as a mouse pointer. You can see our review of WebOS here.