Not so fast...
I'm not sure these are direct competitors of the iPhone.
I, for one, am not going to pay airtime/data/per song charges to "download" music onto my phone. I prefer to move my large, existing collection of MP3s using a fast, wired interface between my PC and Phone (which isn't even an iPhone). I'm sure a lot of young hipsters are open to the idea of paying $50 a month for music "rentals" but that's only one market segment.
In addition, there's a massive gap in UI between an iPhone and some of the crap Samsung is currently selling. It's like the iPod vs. other players. A lot of player have more features, they don't sell better because access to the features is painful suckage
I'm not sure this is the bell tolling for Apple, as the article implies