Here is a leaked photo of an accessory for the Lumia 1020.
This is an add-on shell has has various functionality; the add-on has a 1020mAh battery (35% boost), microUSB charging expansion, tripod mount, dedicated shutter button. And with a $70 price tag (unconfirmed), it should be worth it, especially with those tripod mount and extra battery life.
there is no wireless charging option with this shell, that will be provided by another shell accessory.
More pics of the shell emerge, courtesy izvestia