One thing to realize is that this is not an improvement. In this case the firmware is used to correct for less strict quality control in production (or potentially even worse - engineering). You see, before all this focus micro-adjustments, the manufacturers were forced to calibrate their devices to much tighter tolerances before the device got shipped, otherwise they would have to deal with it as a warranty repair. Now - no big deal, the customer can do calibration themselves if they are so picky. In other words, they just made a bad product quality into a feature for which the customer can pay extra. Pure marketing genius!