The 80's was the most unoriginal decade in moviemaking history. It was the decade of the sequel, of the Hollywood filmmaking-by-committee target-audience-oriented filmmaking that paved the way for the current trend. It was the decade when the commercialisation of moviemaking was put into the foreground and producers replaced directors as creative heads. The 70's and late 60's was really the most revolutionary period of moviemaking in the US, the only really freely artistic period in Hollywood, until it was killed by the 1980's, and then resurrected with the indie scene of the mid 90's. Just to reorient your backwards history.

But yeah, a lot of great and classic films don't seem very striking anymore because their revolution has become convention. Films like Citizen Kane and Star Wars still entertain because their true power in pure storytelling but to watch Citizen Kane in 1941 or Star Wars in 1977 would be a shocking experience whose modern equivalents might be something along the lines of maybe Fight Club and The Matrix.