Since getting the phone in early Feb and the iMac in early March, my old laptop has been turned on exactly once. And that was to retrieve a document that I had forgotten to transfer. As far as my Internet usage at home, all of my email accounts forward to my yahoo that is pushed to my phone and all of my networking sites notify me by email when I receive messages/invitations/etc. So basically, if I have sufficient time on my phone on any given day, I won't even wake up my iMac that evening. I'd say for the casual web user, the iPhone is a great replacement for a laptop. On the other hand, if you're using it for business my guess is its gonna come up short somewhere along the line.