> If it's important, they'll leave a message or E-mail, which you can check on your own schedule.

Depends on your use-case. I use my phone to support my hobby, the Mode-s receiver in my attic sends an e-mail when an interesting aircraft arrives at the local airport.

So for me it's a notification tool that requires timely attention.

On the other hand it's not a toy, I don't have any games installed.