Sure, nothing wrong with trying to make things more discoverable. I think the first step towards this goal could be making an app which implements what AK is talking about. I'm not sure what this app would be like, or for, but if someone makes it, then we can test how effective are his ideas. You don't have to redesign an iPad to do this.

On the other hand, things can (and probably will) get better organically. The iPad/iPhone is only 10 years old. In that time it has improved both in terms of hardware (e.g. stylus for iPad, 3d touch, extra sensors, slo-mo video recording), and software (voice recognition, Siri, AppStore, multi-tasking, StreetView, even something as simple as cut and paste - none of that was available in iOS 1!). In a few years we will move to smart glasses and virtual/augmented reality. My guess is it will make learning experience better for everyone.