One of its chompees is the traditional work of device-driven lock-ins (in the five years of the Xbox, a consumer might have gone through five phones, installing the same core apps on at least the last three or four).
This is a plutonium-driven device that produces power far more efficiently than the traditional Radioisotope Thermoelectric Generators (RTGs) used hitherto on space missions, such as on Cassini.
You cannot use a speech-driven device to make a note while talking on the phone, for example, or to send a surreptitious text message during a boring meeting.
Some mobile phone zealots believe that handsets - driven by must-have voice functionality and carrier subsidization - will ultimately be the only portable device people will ever need.