Web access via handheld devices?

I know this is the "in" thing among many people. I can't get myself into it! The concept of using the small screen and keyboard seem too awkward to my liking. Additionally since retiring I don't spend that much time out and about. If I am traveling I get by with my netbook and wireless access. Thats about as small as I can go. I'd love to have readers enlighten me in what can be gained by a handheld device. What would an Iphone or Blackberry bring to my life?