iPhone 6s after 3 days: Processor speed, display, 4K video, and Live Photo

I’ve been using the iPhone 6s for three days now, and I’ve still not found the feature or cumulative performance improvement it would take to get me to upgrade from my iPhone 6.

I’ve heard Apple (and many other reviewers) gush about things like speed and camera improvement, and I don’t doubt that many things are better in the new phones, but I do question how meaningful the improvements are in everyday use.