A list of features/improvements so idealistic that once Apple integrates them all, be it in iPhone 7 or iPhone 17, it will accomplish the goal of a perfect smartphone. - All-day (24-hours of usage) battery -- I'll start off with this since I know how widely-desired this is. - Wireless charging. - Perfect display contrast. (Accomplishable through the use of high-quality OLED displays.) - Higher-resolution Retina Display suitable for virtual reality applications. - As anti-reflective a screen as technically possible. - Improved, multifaceted haptic feedback. - An adaptable display that can adjust to add depressable buttons on demand. (This is not a technology only rooted in fantasy.) - Siri interactions at an AI-level comparable to human speech with a low degree of error. - Side-by-side multitasking. - Bezel minimalisation. - Optical zoom capabilities. - A camera on-par with professional cameras, including in manual adjustability. - Performance on-par with modern-day computers. (With the rate that mobile hardware is progressing at, this is wholly possible.) - Completely-oleophobic display. - Self-healing/extremely scratch/dent-resistant body. - Truly shatterproof cover glass. That should be enough to get the ball rolling, and I do believe these are features that Apple is working towards that will one day all be incorporated into an idealistic iPhone model.