1) Items from the 1970s and 1980s will start to be considered antique

It generally takes approximately 40 to 50 years before an object is considered antique.  So as we move into the 2020s, objects from the 1970s will start to be widely accepted into the pantheon of antiques.  The 1970s, with its wild combinations of sleek modernism and textured, abstract naturalism, is sure to attract a large connoisseur following.

Even items from that notorious decade of excess, the 1980s, will begin to acquire the aura of antiqueness as they reach 40 years of age in the early 2020s.  Characterized by bold geometric designs, a preference for bright, primary or neon colors and lavish use of luxury materials, the 1980s will undoubtedly carve out an important niche for itself in the collector’s community.

See full article here