According to the article the contract for hosting XGames in LA is up in 2013 and the contract for Aspen is up in 2014:
So where would you like to see XGames (both summer and winter) held after the contracts are up? It's kinda hard to think of them being somewhere else since they've been in the same place for so long. Personally, I'd love to see an east coast location, but I doubt it'll happen. I feel like Philly or San Diego might be interested for the summer. And either PC or Tahoe for the winter.