[realo]

I guess "it depends"...

My internet-connected smart phone allows me to pay securely for things, unlock the public city bikes for local transit, find quickly directions for a place, provide me answers to questions, read books at the cafe, etc...

All this without a single wallet or bag of "stuff" dangling over my shoulders.

Now... I don't have a facebook account ... YMMV ... :)

[Izkata]

Until your battery dies, or the app fails.

A co-worker had to skip lunch last month because he relied on his phone for payments and the app wouldn't let him pay - no explanation given. I keep critical stuff like payment methods separate and have no plans to stop carrying a wallet because of stuff like this.

[namaria]

It's amazing to me that people who work closely with software are happy to introduce a software powered single point of failure in their ability to function.

[expertentipp]

> Until your battery dies, or the app fails.

Or the phone falls on the sidewalk and the screen cracks rendering the entire phone useless.