Are you keeping the shelves?

Yes

IMO the scale of the shelves cannot compete with all the items around them. They should be longer and thicker.

You might have to extend the backsplash up further as there is not easy way to stop it.

I'd re think the shelves. You need some kind of break point.

you have 6+ inches to the wall trim and an open wall

The backsplash should be the same width as the countertop and up.

if it were mine, I'd beef up the door trim to butt up against the cabinet and create an edge (shelf)

to end the tile. ... sorry, not a fan of that Crown detail.

OK Thank you Could you look at my additional pics and comments? Trying to see what works best. Should I have no shelves so the glass and wall are seamless?

I don't know that this is the right vent fan for this wall because the crown molding above it looks unfinished and the curved glass feature makes it more difficult to have a start/stop line for your backsplash. The broken line of molding at your ceiling draws attention to the unfinished top of your vent fixture which is not a solid piece of metal. Something bulkier with straight lines might work better with your full height cabinets to the right of your stove.

If it's not a decorative/eye-catching tile, I'd keep it to a functional realm -- probably just to bottom of hood and edges of shelves and down. That's where the splashes will be.

I appreciate your input. The vent a hood was purchased when we originally were going to have upper cabinets. We like the open feeling with no cabinets which lead to alot of other issues with the shelves and the backsplash. We have decided to look for a new vent a hood and run the large crown to it. The crown is original to this house built in 1941. still think I want floating shelves but don't want this too busy.

Any other suggestions?

No suggestions apart from appreciating those you have been given. But I'm interested in doing this in a bathroom. Can you give me some information on it. Where do you get the glass. I'm guessing you can chose the paint color so it's matching the wall color. How is it attached to the wall and what are the edges like? Since in your room one edge wouldn't abut a wall I'm thinking it needs to be curved or smoothed somehow so the edge isn't sharp. Thanks for anything you can share and good luck with your kitchen. The view through the dining room shows how lovely your home is. I especially like the dining room chairs.

What about . . . no backsplash? We also were looking at a nice glass tile for our kitchen, but didn't have time to do the backsplash before our Christmas guests arrived in 2018. Liked the clean, open look, and still do. Surprisingly . . . walls still look great and we still haven't bought the backsplash. We might never : )) This is the one we were going to use ( the Dune Wave, in Pewter, the 3" x 12" 3D wavey tile. ). Arizona Tile Dune Wave Glass Tile in Pewter

"and the edges can be rounded."

They call the finished edges "polished".

"The backing allows no moisture."

What sort of backing do they use and what do you mean allows no moisture?

The shelves would need to be accounted for and measure out for the hole to be in the glass prior to tempering as once the glass is tempered that is the last work that can be done it. once tempered anything attempted will shatter the glass.