I think that's gorgeous. I also think an entire backsplash of linear mosaic has run its course, mostly because it was a rather bad, busy design, but the accent stripe still has its place IMO.

The feature stripe in showers is a bit dated. There are a number to select from Floor and Decor.

https://www.flooranddecor.com/glass-decoratives/sea-cove-linear-glass-and-stone-mosaic-100190032.html#prefn1=shape&prefv1=Linear&start=2

https://www.flooranddecor.com/mosaic-decoratives/bamboo-linear-glass-and-stone-mosaic-913500515.html#prefn1=shape&prefv1=Linear&start=10

https://www.flooranddecor.com/glass-decoratives/reflections-light-polished-linear-glass-mosaic-913102800.html#prefn1=shape&prefv1=Linear&start=16

https://www.flooranddecor.com/glass-decoratives/la-palma-glass-and-stone-mosaic-913500580.html#prefn1=shape&prefv1=Linear&start=19

How do you plan to tie in the feature strip with the rest of the bath? IMO the feature wall might be a better consideration.

In a few more years the feature wall will be dated. It just takes one person on some popular decor blog to say so and everyone else will soon fall in line.

I don't think it's glass. There's a shiny reflection on the back wall but the sides don't show any. I think it might be natural stone.

And a few years after that, flippin WALLS will be pronounced dated. (Oh, wait ... already happened. Open concept.)

;-)

I agree the linear mosaic backsplash is dated. What I liked about this accent was that the lines were super skinny and kind of went with the lines in the tile with a pop of darker gray and lighter gray otherwise the other color skinny tiles were kind of matching the tile color. To me, I see it as a timeless classic, but I could be weird. Those thicker mosiac tiles I am not a fan of. I will keep searching. I just think if the tile had no accent at all, it is kind of boring unless it would be put in a super fabulous bathroom where it was really interesting. I heard open concept is now dated and walls are back in.....who can keep up?? Thanks for the input!