The release of the new graphic card AMD Radeon HD 8000 was planned for the first quarter of 2013. Originally the releasedate was set in March but according to rumors in the net, AMD's stock is too well filled to release another new graphic card yet. AMD wants to give their partners the possibility to sell the HD 7000 series first thats why the releasedate is delayed.
If this information is correct is open, at the moment we're talking about rumors.
~Hardware-Rating