It’s happening. After years of tedious technical groundwork, the gorgeous future of PC displays finally—finally—materialized at CES 2017. At this year’s gadget show, a wave of fresh standards emerged to bring luscious high dynamic range image support to computers.
So what’s the big deal? A quick glance at any current HDR TV—like the Samsung 9800—should make the technology’s benefits instantly apparent. High dynamic range greatly expands a display’s contrast and color range, resulting in vibrant, more accurate colors that “pop” against HDR’s deeper, more accurate blacks. Indeed, to most peoples’ eyes, the visual impact of HDR is far more impressive than the sheer pixel mass of a 4K resolution—not that the difference matters much, as industry sources hint that many (but not all) PC-bound HDR monitors will sport 4K resolutions as well.
Before we dive into the hardware, let’s dig into the software and other technical groundwork that’s finally making HDR on PCs possible.
Laying the pipe
You could see this coming if you were paying attention.
HDR first appeared in the tightly integrated world of TVs long ago, but the technology's arrival to the messier, wide-open world of PCs is a more recent development. Both Nvidia’s GeForce GTX 10-series and AMD’s Radeon RX 400-series graphics cards baked in HDR rendering capabilities when they launched last summer. The new generation of graphics cards was quickly followed by Shadow Warrior 2 launching in October as the first-ever PC game with HDR (it also included Nvidia’s wonderful multi-res shading technology). Then, in early December, AMD’s Crimson ReLive software unlocked the rival Dolby Vision and HDR-10 standards in Radeon hardware.
Thus the stage was set for HDR’s arrival on PCs at CES 2017. But an important part of the debut is, well, yet more groundwork.
Crucially, the HDMI Forum revealed the HDMI 2.1 specification, which includes support for dynamic metadata. (The HDMI Forum calls it “dynamic HDR,” which means “dynamic high dynamic range,” which makes my brain hurt, so the more-accurate “dynamic metadata” it is.)
Whereas HDMI 2.0a sticks to using a single HDR grade for a video, dynamic metadata allows displays to optimize individual scenes and even frames to the capabilities of your specific hardware—meaning you’ll always see the best brightness, contrast, color gamut, et cetera rather than a one-size-fits-all HDR implementation. It makes gorgeous displays even more beautiful, in other words.
But there’s a catch: Right now, only the proprietary Dolby Vision supports dynamic HDR, though the industry is working toward integrating it into the HDR-10 open standard, as well. The HDMI Forum plans to release the final HDMI 2.1 specification in the second quarter. (DisplayPort 1.4 already supports dynamic HDR metadata.)
AMD’s FreeSync 2 likewise aims to make vivid HDR displays even more luscious (among many other nifty tricks). A cousin to AMD’s successful FreeSync stutter-killing technology for monitors, FreeSync 2 informs your graphics card about your display’s capabilities, letting your PC pump out a single round of HDR tone mapping, rather than separate passes for the game and display. That optimizes the image and reduces lag.
FreeSync 2 also imposes mandatory dynamic color and brightness ranges to ensure you’re getting appropriate bang for your buck (though, as with any display technology, how good images look onscreen depends in part on how well the content is tuned for HDR).
AMD’s working with multiple display vendors on multiple projects, and hopes to launch FreeSync 2 in the first half of the year.
HDR PC monitors
With all the groundwork set, the launch of actual HDR-compatible PC monitors feels almost anticlimactic—though no less welcome.
LG struck first, teasing the 32-inch, 4K-resolution LG 32UD99 even before the holidays rolled around. Beyond all those pixels and the HDR support, the monitor also packs a USB-C connection capable of simultaneously delivering 4K images, charging a connected laptop, and transfering data over a single cable.
Dell’s 27-inch S2718D Ultrathin Monitor, meanwhile, takes its inspiration from the Dell XPS 13 laptop’s superb display: It’s got a barely there InfinityEdge bezel, and a profile so thin, it borderline boggles the mind. The 2560x1440-resolution display checks pretty much every box an image geek could ask for, with 178-degree viewing angles, 400 nits brightness, 99-percent sRGB color gamut, a 1000:1 contrast ratio, and a USB-C connection of its own.
While Dell’s touting the S2718D as an HDR monitor, Tom’s Hardware reports that “the standard [Dell] uses is different from what TV makers are using,” a detail corroborated by Engadget. Whatever that means, it’s clear that this will be a vibrant, highly accurate display. Dell says the S2718D will go on sale on Dell.com on March 23 for a cool $700.
That’s not cheap, and don’t expect LG’s 4K HDR display to cost any less. Sure, HDR has a better chance of being the future of displays than the 3DTV fad could ever hope for, but it’s as bleeding-edge as bleeding-edge gets on PCs. Being an early adopter is never for the faint of heart—or faint of wallet.
Here’s hoping that PC games and videos jump on the HDR bandwagon to make the investment worthwhile sooner than later. With the PlayStation 4 Pro and Xbox One S recently embracing HDR as well, there’s good chance we won’t have long to wait.