(1) There is no modern fantasy genre as we know it, nor table top role-playing games (especially Dungeons and Dragons). The Wizard of Oz's film adaptation helps inspire some fairy tail like children's tales, while H.P. Lovecraft and Edgar Burroughs remain prominent influences in the fantastical weird fiction genre. Nonetheless, these are likely to remain confined to magazines and low-selling books.
(2) The popular conception of elves and dwarves remain the same; ents, Hobbits, and orcs never come into being.
(3) Beowulf is not as appreciated as it is today, and it certainly doesn't receive a film adaptation.
(4) It's possible that C.S. Lewis never converts to Christianity, or composes the Chronicles of Narnia.
(5) Michael Everson is never inspired by J.R.R. Tolkien to be come interested in linguistics, and thus doesn't create Unicode font.
(6) The Oxford English Dictionary would have different definitions for its W words circa 1919-1920.
(7) New Zealand has less tourism, the homo floresiensis has a different nickname
Among others.