In response, Amazon has started lowering the prices on 4K titles on its Amazon Video service in the UK. As Pocket-lint noticed, While prices could previously reach upwards of £24, 4K titles now range in price from £3.99 to £13.99. Amazon's 4K library isn't as large as Apple's, but with 4K streaming becoming more prevalent, it should continue to grow.
It's not yet clear if the price drops will expand to additional countries, but to remain competitive with Apple, Amazon will need to lower prices across the board. Many 4K movies in the U.S. continue to be priced at $29.99.
Amazon's video content will be available to watch on the Apple TV when Amazon releases its Amazon Prime Video app later this year. There's currently no word on when the app might be released, but a rumor earlier today suggested it could launch this Thursday alongside NFL's Thursday Night Football games.
Amazon is also rumored to be planning to release its own upgraded Fire TV set-top box with support for 4K and HDR in the near future.
Update: It appears the price drop on 4K titles is limited to the UK at the current time, and this article has been updated accordingly.