I always find it kind of funny that after Cyberpunk was coined "X-punk" (steam-punk, diseal-punk, etc) became a construction to denote a particular type of "retro-future", sci-fi as imagined from a past time period.
This wasn't initially true of the word cyberpunk, but over the intervening years its become true, as cyberpunk has more and more denoted the future specifically as seen from the perspective of the 1980s and early 90's. Its become "retro-actively retro".