My goodness, Flintones even. The fashion chase is becoming obsessive and wasteful. As I've ranted about many times on HN, UI faddism is a huge time and resource drain and the industry should just say no or see a therapist.
It sounds strange, but desktop UI's around 2000 pretty much reached the pinnacle of business UI's. The web slid us downhill with its stateless ways, unpredictable layout results, and now wasting screen space while copying touch-screen-oriented design for mouse users who don't need swollen boundaries. Use 5-pixel lines to visually segregate panels, saving you about 20 pixels of width versus white space. ("Web" pixels, not nec. actual pixels.)
(The only exception is perhaps drill-down link-heavy lists/reports/charts. The web served these well.)