According to Intel (by way of Macworld), its integrated graphics processors can hold their own against 80% of discrete graphics cards on the market. This could not have been the case even a couple of years ago. And Apple likely has an influence on this advance from Intel. More and more, consumer class PCs require more processing power for not only daily computing needs but where the future of computing is headed. VR, anyone? Artificial intelligence? 4K monitors?
And with rich media continuing to be a part of the computing experience, not to mention multi-tasking, more CPU and graphics power would be greatly appreciated.
For gamers, integrated graphic setups from Intel will not work for the most part in that some compromises are demanded from users to not being able to play the games at all. A much more powerful Macbook Pro with discrete graphics chips from AMD or Nvidia are needed. Perhaps, even a Windows machines. But for games that are couple of years or older, it is possible the Macbook can labor through it, albeit, some requires that the settings be lowered.
Furthermore, there is the likelihood that with the new chips, the Macbook will have a slightly more improved battery life.
The Macbook was introduced in April of 2015. With Apple holding a press event for Apple Watch and the iPad, many hope that Apple would also refresh the Macbook line, including the 12" Macbook.