It's a cool effect, but one with some issues.
Like the best answer is to install the splash on the flat wall before all the casework and counter tops. That lets the upper cabinets and counter top "trim" the exposed edges and not vice versa.
You need to make sure you hold back from all the electrical boxes, and placing a big giant ground all around your kitchen is less-than ideal.
The metal needs a protective coating of some sort, too. This, because the oxidations from tin or galvanized steel stain; copper oxides also stain, but have that fillip of being toxic, too.
Coating the metal means having to be careful with and scrubbing or washing of the surfaces, too.
Now, the ambient effects in a kitchen are very cool, which is why using a higher-quality laminate can ofter work better than using actual metal.
But, I may be biased, I had to do a gut kitchen rehab in a house where they'd used tinned copper ceiling tile as the full-height splash. Which had not liked contact with metal sinks and plumbing, especially with the trace voltages the jackleg electrical was passing into it. Pretty, though, in a razor-sharp, corroded and razor sharp, mildly electrocuting sort of way . . .