I found this on www.lancearmstrong.com
2/15 ~ HOT! Let the speculation begin! We're finally allowed to let you know the first official word from Shimano on their next generation road group.
Dura Ace®, will be completely renewed. The new 10-speed system has been developed under the concept of Speed, Smooth and Strength and this will be reflected in the product with its super-light weight, high durability and high efficiency. There will be no need to modify frame dimensions to accommodate New Dura Ace®.
2/15 ~ HOT! Let the speculation begin! We're finally allowed to let you know the first official word from Shimano on their next generation road group.
Dura Ace®, will be completely renewed. The new 10-speed system has been developed under the concept of Speed, Smooth and Strength and this will be reflected in the product with its super-light weight, high durability and high efficiency. There will be no need to modify frame dimensions to accommodate New Dura Ace®.