After the era of Kasparov, who used extreme opening prep, Carlsen was new in that he didn't play for an opening advantage. He played innocuous crap to get an equal middlegame and won anyway because he outplayed his opponents, especially in the endgame.
You would already know this if you've been paying attention for the last 5 years... since your account was made in 2012 it seems like a dumb question.
And I'm not a Carlsen "fan" I'm a fan of chess.
To magnus carlsen fans:
Any new style? Any new opening? Did any old opening become fashionable?
In 20 years, what would chess theory say about Carlsen?