That's a pretty big nothing useful...
It would be if we hadn't been beaten over the head with Peter's compassion and love for manking all first season. It was the entire point of first season, that Peter wants to save the world in a big way.
For him to suddenly have no respect for life, especially being very clear on how much more powerful he is than others doesn't make any sense. But it was the only way to make Nathan matter at all (because he didn't, his storyline was over with the bomb), so they shoved it in there.
Peter is the compassionate one, Nathan is the one-track-mind -- then they switched it, and it didn't make sense, making it a pretty stupid something useful, regardless of how big it was, or perhaps because of how big it was.
And since the bigwigs at NBC are so dumb that they save a storylineless character from a Nuclear explosion (Nathan scientifically should have been dead instantly), there's no way they're going to let him die over two bullet wounds held in the arms of a man who's blood can heal him.
There's no reason to fear for Nathan, everyone likes the actor, everyone liked how the character was first season, and even though his potential is used up now that we know he is a good guy, no one wants to let him go, especially not the big execs who do their focus testing and see that Nathan scores so high.
Nathan had too much potential. He was one of the most interesting characters that never got to shine. They shouldn't waste a great character that they didn’t fully explore.
What show have you been watching????
Nathan made a full switch from ******* politician to bonafide self-sacrificing Hero... NATHAN saved the world the first time, Peter just convinced him to do it. Not only did he have a killer and full drawn out redemption arc, but his power of flight was one of the hottest things about season 1, especially when we first saw him take off from the Corinthian Hotel... they ALWAYS show that clip.
Nathan has been fully explored (tell me what else they could explore, if you disagree) AND he has had plenty PLENTY of time to shine... remember all your favorite Nathan moments? THAT was him shining...