I walk with my head up and scanning the world around me.
Don't have one.
I don't have one, and don't need one.
I use mine for
Calls
Internet
GPS
Games
Texting
Photos
Video
Sound
Calendar/appointments
Videos/Netflix
Music
Banking
Address Book
Magazines
Movie Times/Locations
Restaurants
TV Guide
Many Guitar Applications + tabs
I use my iPhone for damn near everything!
Don't use it for games or even communication beyond a very limited group, but it is handy for lots of things. My navigation app works better than any dedicated device that have been in a vehicle with, and that is just the start.
Have carried it for better than two years, and before it nothing. Who'ld a thunk it would become a don't leave home without it item?
FYI - you CAN take audio out of many phones, fully uncompressed in a digital format, and use the DAC and clock of your choice before going analog to your preamp/stereo. Maybe you are a strictly phonograph guy, which I can definitely respect, but if you also enjoy CDs and/or DVD-A discs then, we're talking about more than double the maximum quality of the digital audio encoded on either of those formats.
Even an iPhone can stream 24bit 48kHz WAV and AIFF files. I've never tried 96kHz or higher, but I don't see why it's not possible. In the setup I'm suggesting, the phone is simply acting as data storage and letting the higher end equipment handle the conversion and playback.