My wife is a salesperson. When she goes to work she carries two iPhones, one windows based laptop, one iPad. The only machines she actually uses are the iPhones, one personal, one business, and she uses them for everything. I watched her use an ap to scan a document and then fax it to where she wanted it to go. She keeps track of accounts and updates sales call data, all on the iPhone.
Impressive, if you ask me.