The 7th beta of iOS 10.2 is seeded to developers and public beta testers. The first beta was seeded at the end of October and it looks like that after all these releases, the iOS 10.2 will be released in a few days or weeks but it will come before the end of 2016.
The beta 7 of iOS 10.2 will be available for devices as an over-the-air update that are part of developer program or have an apple developer id. It will be also available for public beta testers and it will also available as an OTA update on devices which have the previous version of this iOS 10.2
As for new features and changes, they are yet to be explored and discovered. If anything new is discovered then we will update you ASAP.