The tub surround hides the plumbing/electrical/air jet tubes.
OK, those things aren't hidden yet, but they will be when it's finished! The faucets are sitting in place right now, but we have purchased mosaic glass tile that will go on the top surface of the tub surround and up the walls as a backsplash.
Even though I purchased the faucets years ago, I'm still totally smitten with them.
All is well in the Keweenaw.