This smartphone is really differnt from other smartphones that are available in the market. Kudos to Panasonic for designing this. Just curious to know if touchscreen works properly if the screen becomes wet ? Because the mobile I use currently (Samsung Galax) stops responding when screen becomes wet.
Waterproofing a phone provides a basic feature that is worth more than most of the bells and whistles being added these days. Well done. Current phones have water sensors that void the warranty when they get wet in an accident(drop, spill, swim).
More than the 'use case' you described above, I think the use is more genuine & required for tropical 'rainy' climates. A good majority of the people in developing economies commute using two wheelers and manage to answer their mobiles at the same time in all weather conditions!
This is common for many Japanese and Korean companies. All companies are trying to make everything from camera to TV to cell phones, and form huge and unmanageable conglomerates. I am nor sure it is a good business model.