Microsoft is nowadays planning to deliver updates to Xbox One every other month. Following the release of February system update, Microsoft is on the way to release March system update which will significantly improve the multiplayer and party experiences on Xbox One. Microsoft today announced that they will be sending out invitations to select Xbox One customers to preview upcoming Xbox One system updates and provide feedback.
Beginning today, Xbox is inviting select Xbox Live members to preview new features coming to Xbox One in a March system update and future system updates as they become available, asking them to provide valuable feedback before the updates are implemented worldwide. Selected participants will receive a message over Xbox Live with a code to register. The next system update will begin rolling out next week to those who will preview the new features. Once registered, participants will be able to test the early features included in the update and provide feedback on a private forum and can opt out of future waves.
Source: Major Nelson