Over floor, yes (sometimes), but not over the walls. This requires removal of the existing walls, then new wall material, cement backer board, etc. then tile - a full job. And be sure to pick a pro. I got a call to look at a 4 yr old (new) shower that was part of a new addition. They said a couple tiles (wall mosaic) were a bit loose, and it was leaking into the basement. When I removed the tile, silicone patch and scratched out the grout, I could see the corner wall studs an inch wide! Not a good install, but shows what some guys will do to save time and materials.

It's a beautiful tile, but I wonder about how you line up the ridges when two tiles meet in a corner. Is one side of your shower more visible - maybe use this tile on one wall only? I would probably put a seam right in the center of either wall, but a good tile installer should be consulted before you order. We used large width Porcelanosa tile with a dimensional wave pattern in our 5 ft powder room - but on one wall only, and we did the seam in the center.

mssmick78- There are Dal Tile stores and Slab locations in LA. Ask the Dal Tile retailers/ slab sales people about installers they recommend. Make sure that your sub-floor is completely leveled, read the warranty completely, & ask the store what cleaner they recommend for their grout that won't void the warranty. Here is a DIY blog about RevoTile: https://livingwithlady.com/2021/03/how-we-saved-a-ton-of-time-and-effort-using-revotile-in-our-mudroom.html  Her floor looks beautiful. She is in Spokane, WA- where earthquakes tend to be less than 2.0 on average.

@Millworkman Thanks. That thought about adding another layer (and maybe getting less heat) did cross my mind. I'm not too concerned about it though as we cook a lot and are generally hot natured people (we keep our heat pretty low in the winter). Plus the kitchen is fairly small (less than 200 square feet and that includes a broom closet and small walk in pantry). I'm sure the proper way to do it would be to rip it all out but I worry about damaging the heating system. Is a little heat better than the risk of no heat? Ha!