Apple today seeded another beta build to developers using tvOS 10. Developer Beta 7 comes in at build 14T5329a, and it contains mostly fixes.
The news comes 11 days after beta 6 was released, and there was a new iOS 10 build released a bit earlier today. Other than the two, there weren't any other betas offered today. watchOS 3 and Xcode 8 are notably missing, as those are the oldest ones listed. While iOS, macOS, and now tvOS all seem to be updated more frequently, one might wonder where the others are, especially since Xcode betas generally tend to coincide with everything else.
Of course, everything is getting closer to a final release, which should happen sometime in late September. This might be why new builds are being released sporadically.
The release notes don't say anything specific about what's new in the build, but there are only two pages of "Notes and Known Issues" now, with just one item listed as a known issue.