Hey, keep your hysteron proterons to yourself. 😄
All kidding aside, this comes up every now and then but there does seem to be a trend like blisshifi alluded to in his post. Case in point: my new speakers are much more revealing, have more air, ambience and room/studio presence in the recording but there's no etch, shrillness, or harshness to speak of. The mids are enhanced with brass, winds, strings, chimes and percussion that don't ever shade the sound but seem to burnish it, imbuing them with body that project out into the room. And the bass is propulsive, tight and expansive with all the sound emanating out from the speakers to the point where they can face with minor toe it, allowing a very wide sweet spot.
All of that is only possible with new driver technology that hasn't been tried before. Throw in a wonderful sounding all digital amp that "hears" deeply into a recording and you have the recipe for some truly engaging sound.
That would be my definition of some "new hifi sound" as I haven't heard it performed this way in all the years I've been in this hobby.
All the best,
Nonoise