Yes, it is definitely worth buying a 4K FireStick. Here are some reasons why:
-The picture quality is significantly better than 1080p.
-You will be able to see more detail and clarity, which makes for a more immersive experience.
-With a 4K FireStick, you will also be able to watch movies and TV shows in HDR, which further enhances picture quality.
-The 4K FireStick is also more future-proof, so you will be able to enjoy newer content that is released in 4K resolution.
Overall, purchasing a 4K FireStick is definitely worth it if you are looking for the best possible picture quality.