In the two cases I know of, nothing replaces Office-type docs (as in, they don't use them), and Facebook replaces an over-loaded SD card that never leaves the camera for photo management.

(Note, I'm not the GP.)

In my family's case:

Word: Google Docs is more than enough for the type of documents they work on.

Photos: Photos are taken on the iPhone and shared directly via FB/etc. No need to touch a computer.

Depends.

Some users don't need Office-type documents on the laptop -- they have a work-issued computer or it's not a requirement of their day-to-day needs. Similarly with photo management -- maybe they don't have a camera, or they just leave photos on their phone without a copy on the computer.

Other users believe in the Google vision, which is Google Docs and Google+ Photos. (Picasa's web interface is basically dead now.)