Misleading type attribute in filebeat config

Elastic Stack Beats
3

Now the documentation states:

"@metadata": {
  "beat": "<beat>",
  "type": "<event type>"
}

But with Beta 4 it's:

 "@metadata" => {
    "index" => "logstash-2015.11.02",
     "type" => "log"
}

Will the attribute "index" change to "beat" with RC/GA?