There are no new features in this driver, but you should see performance benefits in several cases where framerates are CPU-limited. The company gives the following examples:
Company of Heroes – performance improves up to 25% with HD 4600 series products and below as well as improvements of up to 10% on HD 4800 series Crysis – performance improves up to 13% in multi-GPU configurations Crysis Warhead – performance improves up to 11% in multi-GPU configurations World in Conflict – performance improvements of up to 30% can be seen in settings that were previously CPU limited