This thread made me curious about my other devices and so I took a look.
The IPS LCD on my Microsoft / Lumia phone uses ClearBlack and has a black-rainbow pearlish gleam to it at certain angles which is reminiscent of solar panels, butterfly wings, and compound eyes under high magnification. It's there when it's off, it's there when it's on, but you have to tilt the phone around at special angles to get that gleam and shift.
Surface Pro 3 and 4 are similar in this respect as well.
The IPS on my LG tablet has a similar gleam to it as well at certain angles, but not quite as noticeable as it is on my phone. It's there when it's off, it's there when it's on, and you have to tilt around for it, too.
My v30 has yet a slightly different gleam to it at similarly specific angles and it's there when it's on and it's there when it's off and once again, you have to really tilt and angle your head to see it. Unlike with IPS LCD, however, it's not a rainbow. For me, it is literally a bit of a gleam in terms of shift.
After looking at the things that I own, my conclusion is that the / a / any kind of a 'shift' is there, period, on any digital screen and especially on screens with a 'glossy' finish.
That said, being that the v30 series is a multimedia-geared phone, in my opinion, any minor 'shift' is simply a part of it. Not a side effect. A part.
Here's why:
I'm very blue light sensitive and so by virtue, I'm also (cool) white light sensitive. I hate driving in the dark because everyone has their white lights blasting on via high beams and in comparison, my bedroom with its warm white lighting is a cave.
I'm also a traditional paper and pencil artist and that means sitting at a desk under a 'pure' and cooler white lighting because any other lighting distorts color perception. I also do graphic design which means that my computer screen display needs to be as 'pure' as possible as well which means cooler white lighting.
The v30 is, amongst other things, a phone designed for the arts. It's meant to display colors as pure as possible and it's meant to do it right here and right now and the only way to do it is with a more 'pure' cooler white lighting.
If I take a photo right now and with Comfort View off, what I see is what I get and that's that. If I need to adjust, I can do it on the fly without having to worry that I'll see something different later on when I change devices or if I print.
The phone gives us the option of Comfort and at this point - especially now that I've had a chance to work with photos, other graphics, and videos - I really have to believe that there was a specific purpose in that decision and that it is related in part to what we're discussing right now.
(And no, in my experience, the phone actually does not make things more blue in general in spite of the cool lighting. If photos are coming out more blue it's almost assuredly because the point of focus isn't correct.)