If you‘re thinking of using stainless steel, especially for an island, you may be able to save money by investigating what restaurant supply companies have to offer. Lots of professional kitchens use a standalone stainless steel table as a work station and this may suit your needs at a much lower cost.
The Brown Residence by Lake|Flato Architects has a pretty interesting kitchen. The backsplash window doesn’t look directly outdoors but rather into a hallway. It‘s an interesting way of connecting the spaces and ensuring a seamless transition and a continuous flow between them.
This is a kitchen designed by Crescent Builds. It has a strong traditional, almost rustic design but with a modern edge. The window backsplash is definitely an interesting feature. It doesn‘t covers the entire space between the counter and the cabinets, leaving a tiled section that incorporates the electric outlets.