Following the public launch of tvOS 11.3 late last week, Apple is moving ahead with a new developer beta to try out an upcoming software update.
Today, Apple officially seeded the third tvOS 11.4 beta to developers. This follows the public launch of tvOS 11.3 recently, which brought with it only minor updates and features to the mix. It is likely that this release will continue that trend, with tvOS 11.4 likely only meant to fix behind-the-scenes bugs that may have cropped up since the public launch of tvOS 11.3. The new software may also be meant to enhance the overall experience and add general improvements as well.
To update, developers must have the proper configuration profile installed, and the Apple TV set-top box must be connected to a computer so the pre-release software can be setup via Xcode. If the developer already has a registered fourth- or fifth-generation Apple TV, they can also turn on automatic updates, which will pull down the latest beta seed as well.
If Apple does add any new forward-facing features to the latest beta of tvOS 11.4, we will update this post accordingly. There is likely going to be a corresponding public beta released for this software at some point in the near future. Likely sometime this week.