It's four millimeters thick.
Understand, that's about 1/8", and it's flexible, so you don't have to worry too much about it breaking if you bend it a bit. (No, you can't fold it, but a bend that would destroy an LCD screen won't hurt this one.)
Mounting is accomplished by screwing a mat to the wall; the display is held to the mat magnetically. There's a ribbon cable from the display to the rest of the TV's electronics, which are incorporated in a sound bar. It's possible to mount the TV in such a way that the ribbon cable is hidden.
LG calls it "wallpaper" and it's not damned far off from that.
...but the price you pay for it is steep. The 65" model has an MSRP of $8,000 and the 77" model is a mere $20,000.
Looking around, I see that LG has built prototype displays which are even more incredible: a display that's less than a millimeter thick, and flexible displays, and I saw a video which featured an LG rep rolling up a display showing a cityscape.
The day is coming when you'll bring home your new TV in a tube. You'll put three or four screws in the wall, then pull the TV out of the tube and hang its top rail from them, and gently let it unroll to the floor. You'll plug your devices into the bottom rail, which is where all the electronics and connectors and power supply will be (assuming they're not connected wirelessly).
Higher-end TVs will just be part of the wall. Some TVs will be glued to the wall like actual wallpaper.
* * *
Today I was thinking about the world we see in Back to the Future II, where Marty McFly is in the world of 2015. Doc visited 2015 near the end of the first movie, coming back in an outlandish outfit and telling Marty that "It's your kids, Marty! Something's gotta be done about your kids!"
He refueled his time machine with banana peels and part of a can of beer, all dumped into the car's Mr. Fusion, which took the place of the plutonium reactor he'd built to power the time machine. All well and good.
...but at one point in the movie, we see a futuristic car stopping at the gas station and being serviced by a robot. And it occurred to me: why was the car there?
I mean, there's no need for gas stations any longer, is there? Except for a few antiques, in the BTTF version of 2015 they have cheap, portable fusion reactors and they're make quite a bit of power--we know the time machine needs "1.21 jiggawatts of electricity." Assume he meant "gigawatts" and is just mispronouncing the word--1.21 gigawatts is not chicken feed. In the real 2017 we still need a big fission reactor to make that kind of power, but in the movie's 2015 you can get that kind of juice from a common household appliance.
So why are cars not fusion powered in the movie 2015? Or are they?
I had a gander at "Futurepedia" which is a wiki for BTTF, and the entry on Mr. Fusion said, "Mr. Fusion was, apparently, was impractical for powering a car...." but I fail to see how that could be.
Call it useless nitpickery and forget it. That way lies madness, anyway.