Patterns, Designs and Colours
Geometric patterns are a main feature of retro fabric and still look great in a modern home, try using in a study or child's bedroom as a curtain fabric or for a smart roman blind.
Bright colours such as lime green, turquoise, orange and purple were used widely in the 70's and used to paint complete rooms. I wouldn't suggest this look for today but you could paint a feature wall in one of these bright colours, perhaps in a kitchen or playroom. There are also retro style wallpapers around which would look stylish used for a feature wall.