That's why printers were created.
Yeah, but I'm trying to transition to a paperless car and save the environment.
Seriously, why is there a breakout game? Why does the empeg have visuals? Why the calculator? Why do people put neon lights in their PCs?
Because it's cool. (Well, actually, why *do* people put neon lights in their PCs????
)
Maybe it's usefulness would be limited due to the screen size, but there is a certain satisfaction gained from squeezing the most unexpected functionality from a device.