In order to determine the location of the leak, the crew had been sealing off small peripheral modules of the space station while Mission Control looked for accelerated pressure drops inside the sealed-off sections.
When you tack that figure on with the 30.3 x 18.3-inch (769.3 x 463.74mm) surface area that also remains relatively unchanged, you'll find a substantial amount of space will need to be dedicated to the high-end peripheral.
While the Lightning Dock can easily be justified by the smaller internal space it will require in the fashionably thing iPhone 5, the pricing of this almost essential peripheral is a tough bit of progress to swallow.