For sure Richland will be Tinity 2.0 which, AFAIK, which I thought was going to be a 28nm shrink, but may only be a new stepping with a very small performance bump. I'm hoping Radeon 2.0 means CGN. That would go along with the APU focus on GPU power over CPU power. But what is coming after that?! If it's a new uArch, I can't see it coming any earlier than 2015 (and that's with the recycling of older design elements, say from Thurban).