However, Kotaku says the following in an interview: "Here’s the catch: the Super Duper Graphics pack is also coming to lots of other platforms, including Xbox One S, PC and Switch, even mobile (unclear if/when it’s coming to PS4), basically everything that’ll be running the game on the new Bedrock Engine. “It will be anywhere that you can play Minecraft in the new version,” Egbert said. “It will improve any screen on which you play, but the best experience will be on Xbox One X.” This is the theme: what you can play on Xbox One X is playable elsewhere, but, short of a high-end PC, it will simply look best on the X."
No, the Super Duper Graphics pack isn't officially coming to Java Edition. The renderer works vastly differently between the two editions, so officially supporting the SDG pack would mean rewriting the renderer, which is a huge undertaking and would basically kill Java Edition. There may be, however, an unofficial method to use the SDG pack on Java Edition. There's an upcoming mod that replaces Java Edition's Java / OpenGL 1/2 renderer with a completely custom one in C++ / Vulkan, that will natively support shader packs, and will use the Bedrock format for shader packs (as well as supporting Optifine's format for shader packs). Eventually when this mod is fully functional, you may be able to take the SDG pack files and load them using this mod.
Though there's no real need for the SDG pack in Java Edition. We already have shader support through Optifine, allowing for the same features that the SDG includes, plus more, and Optifine's author is very close to the shader development community, and is always adding features into Optifine that make our shaders even better. A recent addition that is currently in the Optifine previews, that my own pack as well as two others now use, would be hybrid forward/deferred support, which allows for things like multiple layers of reflections (you can have an iron block behind water, behind stained glass, behind another layer of water, and each layer has its own independent reflections, without the hybrid forward/deferred support, this is impossible).
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Author of the Clarity, Serenity, Sapphire & Halcyon shader packs for Minecraft: Java Edition.