"lighting, rounding, color, and visual strength" along with "clarity, content-focused" etc. are used as hollow buzzwords just as much as "golden ratio"
The whole minimalism/flat movement from iOS 7 and Google's Material and Microsoft's Metro crap was frankly a lazy and weak copout, a give-up on trying to make nice looking UI that could also be functional.
Why is it that sci-fi has always had such beautiful UI since Star Trek but the real world is still so boring?