Yes, typically 4k textures could be overkill for animation, especially if you're rendering the frames at a resolution below 2k. However, in some close-up shots, it could really make a difference. Procedural textures will hold up under any type of shot, but image textures can really break down if your camera is in very close. That's why I almost always create my textures at 4k, simply because I don't know how the client will use the model so it's important for it to work under every condition. PBR texture maps are excellent for this. Unfortunately, this is where purely procedural materials can be limited, in a PBR or photorealistic workflow.

Your stuff is looking good. Keep it up.

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