A new Xbox One build for members of the Preview Program is rolling out, according to Xbox team member Mike Ybarra. The build is to be released at 6PM PDT.
You're not crazy if the link from Ybarra's tweet doesn't work for you. It will take you to a private forum for Preview Program members. If you're keeping tabs, here's what the release notes said (via MSPU):
Language Independence – Based on overwhelming fan feedback, we’ve enabled Language Independence to give you even more choices over your Xbox experience and how you engage with your Xbox One. Language Independence gives you the freedom to choose any supported language on Xbox One, regardless of your location.
Please try out this capability and give us your feedback. If you encounter any issues, change your language and location settings back to their previous values to see if the issue still exists. We look forward to your feedback.
Game Pre-orders – When purchasing a game pre-order, funds may no longer be deducted from your account immediately (depending on when the game pre-order is purchased). Pre-order funds will now be deducted from your account 10 days or less prior to the game’s release date.
While the Windows 10 Anniversary Update is slated to arrive next month, the schedule for the Xbox One update seems to be a bit jumbled. It would seem that Microsoft has two updates in mind.
It's not entirely clear which features you'll have to wait to see, but one thing you won't see is DVR functionality coming to the Xbox One, as Microsoft has halted development on the feature.