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There is little or no use to the user for most of this stuff.

These are all features of modern smartphones.

Mapping screenshot: Quick redisplay of last map without having to turn GPS back on and re-resolve location
Geotagging: Great feature, all your photos know where they were taken, answering "Where were we when we took this?" Some programs will show a map with your geotagged photos overlayed, pretty cool. IIRC, the iPhone will even record the direction and angle your were pointing, which is good fodder for a program that builds larger images from smaller ones.
Browing history: Helps you go back to where you were. I use this instead of bookmarks quite often. This was a selling point of the latest Firefox.
App screen snapshots: Instant redisplay of app again, before it gets completely started, helps keep the impression of a fast, responsive UI (a fast UI is mostly subjective, and Apple puts a lot of effort into making UIs *feel* fast even if they aren't).
Keyboard cache: Very useful to auto-correct, and to keep you from having to type long words over and over.
GPS to find the kid: This is a feature of the modern iPhone, accessible by the user, meant to be used for lost or stolen phones. If you have permission, you can locate any iPhone. Even without a smartphone, the cops can always get the phone company to locate any phone even if it's turned off (they can wake your phone as long as it has a charged battery in it).

Each of these features is bound to have people who think it's useful.