I don't care if Atmos/X is a "success" in mass consumption terms so long as it's available on movies released at home. I could say the same about 3D video, but the TV industry seems intent on dumping it anyway.
As for HDR, I've always said it's a gimmick to make 4K noticeably "different" looking from 1080p as the resolution alone is not enough to notice on most average sized sets at typical viewing distances. I find HDR color often oversaturated into the surreal realm on the QLED I have. I turned it down as much as it allowed me, but it's still hyper surreal with some material. But hey, it looks different.....
HDR contrast can be impressive, but it's oddly unnatural as well since with enough brightness in the real world, your own eyes wouldn't allow what they achieve at lower light levels with HDR, which is to allow a half night and half daylight scene on the screen at the same time with no reduction in contrast. It's just not realistic and they typically need multiple exposures and or computer editing to do it since real world cameras and film have exposure limitations too. Digital cameras make it seem possible, but they are just doing the multiple exposures and processing internally.
Mass consumption is usually a determining factor as to whether or not a format will succeed in the market. Remember laserdisc, much better than VHS, it had digital audio way back then even before many commercial cinemas, however it never really took off, it remained in the niche. Laserdisc was the only way to experience Dolby Digital or DTS in the home. Eventually it fail way side even with strong support from the HT enthusiast and videophiles. That failure threatened the long term viability of home DTS and Dolby Digital. Then came DVD, oh my god, DVD blew the heck up, one of greatest consumer electronics/video formats in history and guess what, it carried Dolby Digital and DTS audio tracks. So DVD, Dolby Digital and DTS became widespread, mass consumers success.
I kind of see Atmos and DTS-X in similar situation that Dolby Digital and DTS was in the laser disc era. This time it might be streaming that crosses both formats over threshold into widespread consumer success.
I have to agree with you about HDR. They hyped it up to get people to buy 4K sets which offer no real advantage over 1080p simply because we have to factor in screen size, seating distance and human visual acuity issues. We can't just factor in resolution, with 4k having 4 times the resolution of 1080p, which was how 4K TV's were initially being marketed. As far QLED, from what I heard, they have a greater capability of displaying more colors (wider color gamut) than competing displays. So they tend to look oversaturated even without HDR engaged.