My take is hi-res is marginally better on hi-fidelity systems. I do sense an increased sense of ease in the experience.
But re-mastering is WAY more important.
If "hi-rez" can be sold to the public with the bullshit numbers argument and we get MQA hi-res streaming available on premium services at $20-$30/month...I'm fine with that...
...as long as we're also getting re-mastered music that sounds like it was supposed to.
As an aside, I did chat with a number of folks at CES that were aware of pretty significant efforts at the labels to do just that.