September 11 - The Naked 3-D Fitness Tracker

The rotating scale-and-mirror combination takes 3-D scans of your nude body, then, synced with an app, it spits out weight measurements for arms, legs, waist, etc, and total body fat percentage. 

But it costs an outrageous $1,000. Knowing your body fat can be misleading if, say, you've replaced fat with muscle, but you likely don't need to monitor your general body fat beyond a yearly physical. 

You can now pre-order the world's first home body scanner, with the product slated to ship in November.