It will be useful on smartphones.
The AV1 codec is an alternative to the currently used VP9 standard – its use allows you to save data in a way up to 20% more efficiently, which may appeal to people using smartphones and not connected to a Wi-Fi network. The group behind the development of the AV1 codec is the Alliance for Open Media. These include such giants as, among others Amazon, Apple, Google, Intel, Microsoft and of course Netflix. Thanks to the use of AV1, Apple devices are finally looking forward to the possibility of video playback in 4K on equipment such as Apple TV or iPad Pro.
Nowadays it is not known how exactly in practice the use of the AV1 codec translates into the image quality presented by Netflix. Assuming a large reduction in data usage, it can be assumed that multimedia materials will have to lose some of their original quality. Something for something. The company also did not communicate how AV1 affects performance and battery life of the smartphone. Some reports say that these two issues will suffer the most at the expense of reducing the final internet bill of each user.
We will probably know more details over time. There is nothing else but to wait for the full introduction of the described functionality on devices operating on the basis of a system other than Android.
Source: The verge