Honestly, the whole magnetically-retracted ink reservoir idea is pretty tits. I would totally hang one off a belt loop.
I'm pretty sure whoever wrote the announcer's script was being cynical. Bonus points for them trying to make pen caps look difficult. Further points for the cutaway at :46 right before the pen bounces into a kid's face.
You know what's really inconvenient? Pockets. They're just so damn far away from my hands. I wish that I could keep things in the space near the center of my chest instead. And not in my shirt pocket, because that doesn't let things 'dangle' as I need them to.