"…these things (CSS, Fonts) are more improvements to solutions than they are solutions to problems."

This is about the most succinct way to describe the aesthetic elements of design, I've ever seen. It doesn't diminish the role of style in design, but it defines its place. Awesome!

These can be bigger phone screens, wearables, more movements...Take a look at https://erminesoft.com/how-important-is-a-mobile-app-ux-design-for-startups/

I also recommend a new article about UX design techniques that really work -https://www.cleveroad.com/blog/6-quick-ux-design-techniques-that-really-work Maybe, it will inspire you!