I am pretty sure what Metal H meant was not an actual mirroring effect on the screen, but a sparkling effect that I only noticed so far on dark grey colors. The reflective stripe comparison is pretty accurate.
It wasn't a typical lcd sparkle effect or anything like that, nor the mirror effect from the semi-glossy coating, which I have to admit bothered me initially as it was pretty noticeable, but I've adapt to it pretty quickly and it stopped bothering me. But that was a different thing, even if the coating might or might not have contributed to it, it definitely wasn't the main cause.
Pretty much mostly noticed it here on the red stripes of the forum and the lighter grey background too.
Initially I too thought it might be from the semi-gloss coating, in fact I dunno why, I was actually convinced it was bcs of it. Tho after some time with the display I realized the "fault" lied in the VA technology it self. Or maybe the specific Panel model, as I haven't ever used any other VA monitors before I can't tell which is the correct answer. But for sure it wasn't bcs of the coating.
If it was the coating it would've been affected by day/night, light/dark light environment and I've noticed this had little to no effect on the issue at all. It was there regardless of what brightness/contrast settings you would set either.
And it wasn't subjectively just me, as anyone else I've showed the display (even w/o pointing out the reflective tape effect) also noticed it. My old (ancient ) Samsung 710N that still works has a fairly light matte coating and I've never noticed anything even remotely close to this effect.
I am quite easily annoyed by LCD sparkle btw, I can really make a difference between a sparkle (d)effect and this reflecting stripe (d)effect and can tell that they weren't the same thing. As I've mentioned this was visible even in dark room with the screen displaying very little light like on this forum. Anything else I've tested it on. That's why I think that if it was the coating that was causing it I was not gonna notice it. Unless the coating is made of some weird reflective material itself, talking about structure itself rather than the semi-gloss finish.