Wikipedia: skeuomorphism is when a product imitates design elements functionally necessary in the original product design, but that becomes ornamental in the ne

Wikipedia: skeuomorphism is when a product imitates design elements functionally necessary in the original product design, but that becomes ornamental in the new product design. So CSS that emulates terminals / phosphor displays is still skeuomorphism - the definition mandates only that the design evoke older designs, not necessarily "real-world" designs.