No...
...mostly for this reason. There is no endgame in Skyrim, Even after you've completed every quest and explored every inch of the land, you can still keep playing with your character. Like others have said, NewGame+ is something for more linear RPG's that end eventually.
The other reason would be that since there are so many different character possibilities you could make, Skyrim tries to emphasize starting over with a different kind of character. That would be pointless if your new character was just as powerful as the old one.