You might also be wondering how such thin TVs manage to include input ports. Well they don't ... technically. Instead, they use a thin cable to connect to companion soundbars, which house all of your necessary inputs (including four HDMI ports, three USB connections and an optical audio port). Those soundbars are also Dolby Atmos capable, by the way, and they'll come with every W-series set. They're an elegant way to deal with the mess of wires, much like the single optical cable used by Samsung's new QLED TVs. The downside: You'll need to have a credenza or some other piece of furniture below the TV to hold the soundbar.

The W-series TVs will be offered two sizes: 65 and 77 inches. Because they're so thin, they'll also be much lighter than any sets we've seen before. LG says the 65-inch model weighs just 17 pounds, while the 77-inch model is 27 pounds. And no, we don't know anything about when they will be available or how much they'll cost. Given that last year's G-series started at $4,999, though, I'd wager the new models will cost significantly more.

As impressive as the W-series TVs are, you're out of luck if you don't have a flat wall to hold them. After exploring some stands for the lineup, LG decided to make them only wall mountable (I'd imagine it's tough to keep such a thin display sturdy). Reps also confirmed that you won't be able to install them on curved walls, either. Of course, LG's G-series TVs are still around if you must have an elegant OLED on a stand.

All of LG's new OLED 4K TVs -- which also includes the B7, E7 and G7 sets -- will feature slightly improved panels, which offer better color accuracy (they now cover 99 percent of the DCI-P3 gamut), 25 percent higher peak brightness and improved anti-reflectivity. They also support "Active HDR," which plugs in metadata to help with high-dynamic range scenes, and they'll also be able to support Technicolor's "Advanced HDR" technology in the future.

In a brief demonstration, LG's 65-inch W-series looked impressive, with bright and vibrant colors. I couldn't tell a huge difference from last years B6 OLED, though, which was stunning enough to make me pick one up when its price fell. The Dolby Atmos soundbar was loud, clear and had an impressive amount of bass, though you'd never mistake it for a traditional home-theater setup. I also couldn't detect much of an Atmos surround-sound effect from its upward-firing speakers, though that might have been due to the sample movie being played.

Sure, there are limitations with the W-series OLEDs, but this is also one of those rare CES announcements that hints at the future. You might not be able to afford them yet, but it won't be too long before we see ultrathin displays like these everywhere.