It dosen't matter what wins, in my opinion.
Even if the trend of Broadway continues to turn to the ways of Revivals and "Jukebox Musicals" - there will always be somebody who wants to write something new and original. There may not be as many new works, but there will always be something.
I also don't feel that the Tony's make that big of an impact on shows - yes it may boost ticket sales for a particular show, but the face of the matter is that if a show wins that is not a good show, they will still close - and producers will continue to look for better shows.
Just my thoughts - and I'm not saying Xanadu or Grease or any of the other unpopular nominees are bad - just saying it as a general comment.
You learn to play the straight man, the lines become routine - never really saying what you mean - but i know the scene will change :)