This is rumored to be one of the first in store repairs that Apple brings to iPhone with many more to come. Apple started the $149 in store repairs just this week, and could save the company about $1 Billion a year. Apple Care + customers only need to pay their $50 fee.
From what I’ve heard, Apple Stores have been instructed that the iPhone is the “top priority” for the Genius Bar, and this new repair and crazy machine surely reflect that. In addition to the program changes, many stores have Geniuses that are dedicated to iPhone repairs for sections of their shifts. In short, Apple is pouring resources in to in-store iPhone repairs.
The machine is used for calibrating the iPhone's display to factory standards using some form of air pressure.
Read More via 9to5mac