The trend still goes towards HDR, since it’s not just an effect in games. Nearly any modern TV can decode HDR metadata and most streaming services support HDR. Of course, entry level TVs and monitors cannot take advantage of HDR as much but as better TVs get cheaper that’ll spread even more. My TV isn’t particularly amazing but the difference between HDR content and SDR content is clear. If I have a choice, I never watch the SDR version.
HDR isn’t just an effect like bloom. It’s a way of using the capabilities of modern TVs in a way SDR can’t. HDR is made for taking advantage of OLED, quantum dots, high contrast, local dimming, higher colour gamuts and/or the high brightness consumer screens reach nowadays.
So if you wanna bet, I‘d personally bet on HDR being more like the standard in 10 years because screen tech usually only gets better and HDR is the software/firmware implementation to take advantage of those hardware improvements.