OK here we go:
1. book reading, Magazines, newspapers,
2. Finance (budgeting)
3. Emails
4. Web Browsing of course.
5. Video, you tube, News cahnnels, Catch up TV, game trailers etc
6. Photography (magazine, books, utilties, tools etc).
7. Star watching
8. social networks (facebook, LinkedIn, etc) , phones , messaging
9. Shopping, Ebay etc ...
10. when it is not in my bag it is in my bed with hot chcolcates reading a horror book.
It replaced my 3GS in all aspects except phone calls.
I know I forgot something, very very light gaming.