Too much for me -- any chance you could take advantage of tile behind towers and leave off the doors - place a light there to show off tile?

No to the window wall in tile, but then will it look funny?

Is the shower enclosed with tile? or just its back wall?

I think too much to go all the way up? I think could read, "attack of the travertine", and siphon a lot of light out of the room?

It's an all-glass shower enclosure. The only place that was going to be un-tiled, due to the layout, was the upper part of the window wall and the entire vanity wall.
We continued the shower tile behind the toilet because it was only 36" inch space and would be visible thru the glass shower as you enter - so for a less choppy look on that wall.

Then we wrapped it beside the toilet along the window wall because we wanted a durable washable surround near the toilet. We were going to leave the upper part of that wall just paint until they went too far with the tile.

On the right side, the wall-to-wall, floor-to-ceiling vanity is all white with a 70" wide mirror. So that's going to look like a large painted wall and reflect a lot of light. Would that provide enough visual relief and light?

I should also explain that there's going to be the vanity tower against that window wall that's about 15 inches deep. So the remaining area is only about 30 inches wide on the right side of the window, above the window and a foot on the left of the window.

Tile the whole vanity wall at least as high as the shower wall. I'm afraid it won't look as unified as you'd like it to.

Plus, you'll need a backsplash with your sinks.

We are hoping for a total mst bath remo, room about same size as yours. I'm getting bids upward of $30k & we aren't enlarging room or relocating toilet. May I ask what your remo cost? From your pics, it looks similar to the scale of work we need done, basically gut the room, replace fixtures, cabinetry, etc. & add simple walk-in shower. Must we spend that much to get this result?

Could you provide more details? E.g. does that include all material such as tile, fixtures, vanity; are you doing straight tile halfway up all around the room, or are you including borders, diagonals, etc.; are you actually putting a shower where there wasn't one before; was there a tub before and will it stay/be replaced; is the vanity custom and is the counter granite; dimensions of the room, etc.?

These are variables that would affect the pricing dramatically. I just did 2 bathrooms with floor to ceiling tile, borders, new windows, custom vanities, etc.

One required extensive changes to layout, moving a wall and creating a walk-in closet, and we used travertine tile. That was $37k.

The other was just straight replacement, but with custom vanity, porcelain field tile to ceiling and travertine borders to match the other bathroom, and that came in at roughly $23-$25k.

OUTCOME ON THE ORIGINAL QUESTION: We ended up tiling to the ceiling throughout and it came out STUNNING! Everyone who sees it loves it.

Absolutely best decision we made. See photos.

Never having remodeled before I would not have guessed how fantastic tile to the ceiling throughout would look and feel once done. We duplicated the concept in the other bathroom. (Still awaiting replacement window)

Nice! To me the lines are good at bottom of window - is that tile as sill? Neat and trim as I like to say.... textures....

@everdebz: We used the same granite for the window sill as we did for the counter, shower threshold, and shower niches (not shown). They all coordinate nicely.

That'll last a long time.... :)