That's a nice opinion you have there. It'd be a shame if someone... Disagreed with it.
I mentioned that I'm not out to defend this idea or try to persuade anyone that it's the best thing Nintendo could have done, or the best solution. But I am rather keen to try it. It's rare that I use voice chat on PSN or XBL, and on the occaisions that I do, I'd certainly be more than willing to pull my phone out of my pocket.
And you are correct. PSN does have an app that compliments what the console can do. Now that I think of it, 9 times out of 10 I use the app on my phone to send messages to my friends on PSN, and will glance down to see who's online if I can't be bothered to suspend my game.
Relegating several social and networking features that have hitherto been OS-bound to a smartphone app sounds pretty snazzy to me, especially if it runs well and the UI is slick and easy to navigate.