Have you searched on Houzz? Try typing "shelf across kitchen window" and you'll see lots of examples. I was considering this too, and here's an idea for glass cabinets I really liked.

[Traditional Kitchen[(https://www.houzz.com/photos/traditional-kitchen-ideas-phbr1-bp~t_709~s_2107) by Springfield Kitchen & Bath Designers Reico Kitchen & Bath

But ultimately I think straight shelves might look cleaner and cost far less. Like this:

[Modern Kitchen[(https://www.houzz.com/photos/modern-kitchen-ideas-phbr1-bp~t_709~s_2105) by Toronto Interior Designers & Decorators Shirley Meisels