Every time you hear something described (directly or indirectly) as a "$WHATEVER killer", you know it's not.
Why? Because you're really still talking about $WHATEVER, not the thing that's supposed to kill it.
And you know it? It never does.
Here's my prediction for the iPhone 5: it will sell better than any other handset on the market, including any given Samsung or HTC handset.
Also, any analyst saying things like "Apple might be screwed" is just trolling for clicks.