i definitely think there's still room for original storytelling, but as @punkarsenic mentions, it's difficult for something to be COMPLETELY 100% ORIGINAL NEVER THOUGHT BEFORE! in the modern day and age. but i don't think that means that referencing and frankensteining parts of other stories to create a new sequence is a bad thing, and can in fact be super helpful when orienting an audience
idk i think with the advent of hyper-capitalism in media, where the most successful books, comics, and films being created are ones that are either sequels, retellings, or reboots because they are safe and familiar is probably what causes a lot of creators to feel like originality is dead (at least monetarily)
but i find that hard to swallow when you look on websites like tapastic or youtube and see completely unknown creators making amazing work purely for the sake of making amazing work and coming up with incredibly original and clever ideas that just aren't recognized because they're largely untested, and it's hard to get those fresh ideas out there when companies would rather support the popular and safe "money-makers"
i think that original flavor is still out there, we just gotta trust :^)