Is there a texture pack that it's similar to the launcher image? I really like the material design it got and I was wondering if there's a similar resource pack.
There are hundreds of similar packs, but none of them exactly like the launcher art. More importantly, the "look" of that art would only be accomplished with shaders and no such shader pack exists to my knowledge. Feel free to search for "simple pack" or "flat pack" but don't be surprised if you can't find anything that has that same feeling. It's not really easy to replicate in-game.