The new Ultegra will be compatable with the new 7900 group. I.E. you can interchange stuff. Plus the Ultegra RD's will finally officially accept a larger than a 27t Cass.

This is what all component companies have always done. It is the company moving forward

I am most excited to get access to an 11-27 cass. at a price point I can afford. Ive always liked the standard front with a 27 rear, but a 12 was not enough to cut it. I missed the 11.