It is worth getting a 4K Blu-ray player for a 4K TV as it offers superior video and audio quality compared to regular Blu-ray. 4K Ultra HD Blu-ray has a resolution of 3840x2160, which is more than double the resolution of a DVD and provides a sharp, textured picture quality. Additionally, 4K Blu-ray discs can hold more data than standard Blu-ray discs, allowing for enhanced color and contrast. While streaming services are convenient, 4K Blu-ray currently offers a better picture and sound quality. Therefore, if you want to see the best picture on your 4K TV, a 4K Blu-ray player is worth the investment.