Viewranger is useful during mountain walking trips, and having a large battery means that a person do not have to worry about changing batteries half way. Having a mobile is also useful during emergencies.
This does not mean that one should stop carrying paper maps and learn how to use a compass properly.
Yes, this would be intersting. Please make some shots next to next in different angles, too.
Especially the stylus-side, which seems to add 2mm more to the thickness of the phone.
Are there any informations about recharging-times ?