And would you really want the whole train car to know the email you're writing? In the past I had the same sentiment about phone calls, but what people are wil

And would you really want the whole train car to know the email you're writing? In the past I had the same sentiment about phone calls, but what people are willing to talk about on cell phones in public proves me wrong time and again. It certainly isn't ideal but people would probably do it if it meant their cell phone was the size of an ipod nano(I certainly don't see it being the main iPhone but the iPhone nano) or built in to their Google glasses.