AMD's 28nm graphics is only a die shrink

No new architecture
According to our sources, AMD's Southern Islands are nothing more than a die shrink of an existing 40nm Northern Islands. There won't be any major architectural difference, just a die shrink. However, you can expect to see some more shaders, as at 28nm there is simply more space and the TDP's are lower. This still means that the chips that will replace the HD 6870 and HD 6850 will get more shaders and performance.
The new graphics architecture from AMD will only come in 2012, when the 28nm process gets more mature, and most likely this will happen only in second half of the year. Whether you like it or not, you will have to start getting excited about integrated graphics as from this point there will be more and more graphics on CPUs.