Xbox Live is experiencing some serious downtime at the moment, with many owners unable to play games or even sign in. [Update: it’s back]
This is Xbox Live’s status page at time of posting. As you can see, both “core services” and purchasing are affected.
Microsoft is aware and looking into the problem:
This means no Destiny:
You get the idea. We’ll update when there are any changes.
UPDATE: Service was restored around 1am ET, over five hours after it went down.