How is carrying a device the size of a phone better than carrying a second phone?
I've carried two phones - it's a PITA. You text someone from one and forget which phone you used, or the phone rings and you spend 15 seconds trying to find the second phone. Again, I'm speculating here, but I am hoping this device is something I can drop into my jacket pocket or briefcase and forget about. In the meantime, my 'normal' cell with all my contacts, SMS history, apps and files is still there, accessible, and being used.