Quite the pessimist huh?
I suppose we'll know in a few more months how it works. But honestly, I see no reason why the "Nolan approach" (I really hate that phrase) wouldnt work for a character that is "beyond normal."
Again, plenty of aspects of the Bat films were well outside the purview of reality. Microwave WMD's and all that. Its not the characters that are treated as if they subscribe to real world laws and expectations, its the world around them that does.
That's why it works.
It's worked for the powerless characters (Bruce and Ollie) and I look forward to seeing how it works for Clark. If it works for him, it will work for anyone.
And if it does work for Clark, you can kiss all hopes of seeing a fun, Marvel-ish style DC movie goodbye. DC tried to steal Iron Man's thunder with Green Lantern and it slapped them in the face with a 200 million dollar "pow!" I like to think they learned their lesson. No, if Man of Steel does well, they will focus on strong dramas with lots of crazy action and character-focused storylines. Sort of the opposite of Marvel's method, which is much more light hearted and fun and embraces the ridiculous aspects of the genre.