A new UI trend is emerging - Glassmorphism. This UI element is designed to resemble the feature of smooth glass. The basic idea is to blur the background of the element to give a transparent glassy look.
"I remember vividly the first time I saw Flash on a computer screen. It was 1997, I was finishing up college, and I had managed to teach myself enough HTML to think about pivoting from print design to interactive design as a career.
Web design, at the time, was a clumsy beast. Most web sites were essentially Times New Roman black text on a grey background with an occasional low-quality image here and there. The “design” part was often just figuring out how to best organize information hierarchies so users could feel their way around."