The Apple TV isn't the most obvious Apple device to upgrade to, but with a series of minor improvements in recent years, when should you buy a new one?
The Apple TV 4K is the only set-top box that the company sells. The Apple TV HD was the first modern Apple TV that ran tvOS. Since then, it has launched three new versions, each adding several new features and improvements over its predecessor, with some models offering more significant upgrade than others.
When Apple offered multiple Apple TVs from different generations, new Apple TV buyers had to choose between them, but with a lower starting price and only one model year to choose from, they don't have to do that anymore. First-time Apple TV customers may be able to get an older model second-hand or from a third-party retailer, so it's important to weigh up what was added with each new model.
You can see the breakdown for each new feature, change, and improvement that was added with each Apple TV model.
Unlike other Apple devices, the Apple TV offers a lot of specific technical features that not all users can take advantage of due to reliance on the specifications of other connected hardware. If you want to upgrade to a new Apple TV, you should use this as the main criteria.
If you don't see features like high-frame-rate content, improved HDMI port specifications, more advanced HDR formats, and Thread support, it's unlikely that you'll want to buy a new model. Home cinema enthusiasts, audiophiles, and gaming enthusiasts that can use features such as Dolby Atmos support, are more likely to upgrade.
If you can take advantage of better performance and more storage, it may still be worth it to upgrade to the latest model if you don't have a 4KHDR TV. If you want features like high frame rate, Thread support, and more power for gaming, you should upgrade to the first-gen Apple TV 4K.
It's not a good idea to upgrade from the second-generation Apple TV 4K to the third-generation Apple TV 4K unless you have specific requirements.
It's important to note that the second-gen version of the Siri Remote is only available from Apple for $59. The Apple TV models that it works with should not be a factor in deciding to upgrade.