Update:If 1TB is still not enough for you,Microsoft has announced a 2TB Xbox One external hard drive, allowing you to effectively triple that amount.
What you're looking at up there is the shiny, limited edition Halo 5: Guardians 1 TB Xbox One you'll be able to pick up in October. No word on how limited it is yet but here's a video of it with people trying to convince you that your Halo 5 experience will be RUINED if you're not playing on this.
There's also a Master Chief Wireless Controller on the way. That doesn't have a matching Xbox One but does has gold triggers, so swings and roundabouts. It looks like this:
For more from the Gamescom Microsoft conference click here.