Are we HDR yet? Not quite
Assessing the curent state of High-Dynamic Range support across hardware, software, and platforms.
Read more in each section below.
Hardware
Television
Many units are available in mini-LED and OLED flavours, check out @hdtvtest on YouTube for specifics.
Desktop
For macOS users, the Pro Display XDR is sufficiently HDR, though very expensive.
For other users, the ASUS PA32UCX is sufficiently HDR, though very expensive.
(I recently got a Xiaomi G Pro 27i, which is decently HDR-ish for under NZD$500!)
Laptop
For macOS users, the MacBook Pro's with the Liquid Retina XDR display are sufficiently HDR, though very expensive.
For other users, there are no options (yet?).
Mobile
Most flagship phones these days are sufficiently HDR, though very expensive.
Operating System
Console
Both current generations of consoles support HDR media consumation and interaction (playback and games).
Windows
Generally supports HDR, though requires apps to explicitly and individually support it for actual / correct viewing.
macOS
Generally supports HDR, though displays most apps and system UI in SDR. Individual apps and content is HDR as expected.
GNU + Linux
Both KDE and GNOME now support HDR (on Wayland) as well as a few others. Application support is unknown, as I haven't tried it.
Software
Photo
Adobe Photoshop, Camera Raw, Lightroom Classic, and Lightroom cloud all support HDR editing and output as JPEG-XL or AVIF. I haven't tested other photo editing programs.
Google Chrome (and derivatives) have support for AVIF and properly tagged PNGs (unfortunately, they dropped support for JPEG-XL).
Windows Photos does not support AVIF or JPEG-XL, let alone HDR.
Video
Most video editors have supported 10-bit video and log formats for years, and HDR display and output are being incorporated into that workflow. Blackmagic DaVinci Resolve supports end-to-end HDR import, edit, and export. I presume Adobe Premiere Pro also supports this somehow, if it manages not to crash first (and After Effects and Media Encoder).
Playback is generally well supported on major platforms, though does depend on the particular app still.
Platforms
Nope. Except for reels, apparently?
Flikr
Does not support.
TikTok
Unknown, probably not. A news article claims that Google Pixel 7 phones will be able to upload '10-bit HDR video.'
YouTube
Technically supported, though it does not (yet?) allow for a custom SDR version (or a LUT for transforming the HDR version), and as cameras that can capture HDR are expensive it is restricted to high-end tech channels and one-offs.
Unknown, probably not.
Unknown, almost certainly not.