With 3D Touch, Live Photos, 7000 series aluminium, A9 chip, advanced cameras, 4.7-inch Retina HD display and so much more, you'll see how with iPhone 6s, the only thing that's changed is everything.
Display - 4.7 inches
Camera - 12 megapixels
Operating System - iOS 9
Battery - Up to 14 hours talk time
Storage - Available in 32GB or 128GB