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Go back 10 years from today and Lady GaGa hadn't released an album yet. She's not exactly a dinosaur. By definition, to become the kind of established act that closes a major event, you need to have been around a while.

That said, Adele, Bruno Mars, Bieber, Drake, Ed Sheeran, Taylor Swift... There are plenty of big stars that have either sprung up in the last decade or only really sealed their global fame in the last ten years.

As far as big actors... Emma Stone and Jennifer Lawrence are genuinely big movie stars.

Media franchises... Game of Thrones, Stranger Things, Fifty Shades are phenomena of the last decade.

Franchises that are younger than the 1982-1984 window you mentioned: Fast & Furious, Pokemon, Toy Story, Saw, Jurassic Park, The Matrix, Tomb Raider, HALO.

Shows making stars: ever heard of One Direction? They've a lot bigger than Ruben Studdard ever was. Camila Cabello is pretty big these days too.

Hot books in recent years: the Da Vinci Code isn't new, but it's post-millenial. Ditto The Kite Runner. The Gruffalo has become a phenomenon in recent years. Back in franchise land there's The Girl With The Dragon Tattoo and its sequels and Diary of a Wimpy Kid. The Help. And of course, the aforementioned Fifty Shades.

A big emergence has been the young adult franchises. Twilight. Divergent. Eragon. I won't say they are good, but they are relatively new and very popular.

There's plenty of new stuff.

I give you... Despacito.

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Geoff Johns and the artists he worked with on JSA also came up with new Justice Society characters several years ago, although some were new characters with old names. Same with Grant Morrison's Seven Soldiers. (He also came up with the Japanese "Super Young Team" and the Chinese "Great Ten.")

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You would think that creators would just save their brilliant new heroes for some creator-owned independent series--but they don't.  Modern writer and artists seem to eschew super-heroes when they do their own projects, preferring instead "edgier" stuff.

In the past 25 or 30 years, only one new, original, non-derivative, non-satirical, super-hero has emerged, lasted, made an impact--Hellboy.

Over at Marvel, the period of creating great characters also ended in the mid-70's with Spider-Woman, She-Hulk, and maybe the original Ms. Marvel.  Though those are obviously derivative, they all have enough unique qualities to make them great.

I don't count the Guardians of the Galaxy as great latter day creations since all the members go back to the 70's (Rocket Raccoon, Star-Lord, Gamora, Drax) or even 1960 (Groot).  Knowing how she came about, I still think that Jessica Jones is "spiritually" Spider-Woman (a Jessica who became a p.i. when she lost her powers for a while).  I might have to (begrudgingly) count Deadpool and Squirrel Girl as great later creations because they have displayed originality, grown in popularity, and creators seem to love them--though they're both from 1991...27years ago!