> Tap targets shrink, but they're not any smaller than they would have been on a smaller form-factor phone.
That's only true if the screen was a "magnified" version of a smaller screen to begin with. That may be the case with many Android phones but the iPhone 6 has the same PPI as the 5, meaning the 6 maintains the same tap target sizes and actually fits more information on the screen.
In other words, if you can comfortably shrink a screen's tap targets then it wasn't an optimal screen to begin with.
That's only true if the screen was a "magnified" version of a smaller screen to begin with. That may be the case with many Android phones but the iPhone 6 has the same PPI as the 5, meaning the 6 maintains the same tap target sizes and actually fits more information on the screen.
In other words, if you can comfortably shrink a screen's tap targets then it wasn't an optimal screen to begin with.