From the first chapter of Mobile Interaction Design, by Matt Jones.

“Perhaps, though, the real issue is not whether mobile devices should focus mainly on communication or information processing. There is a broader concern – should one device try to do everything for a user or should there be specialized tools, each carefully crafted to support a particular type of activity? This is the debate over the value of an ‘appliance attitude’ in mobile design. Should we focus on simple, activity-centered devices – ones that might well combine task-specific communication and information facilities – or look to providing a ‘Swiss Army Knife’ that has every communication and information management feature a manufacturer can pack into it?”

Link: Mobile Interaction Design (Chapter 1 PDF 2.8MB, wiley.com)