Charlie Demerjian from The Inquirer claims the Intel G55 integrated graphics will not suck, he claims the chip will have a bit more horsepower along with a decent set of drivers:
The word from early testing is that Intel's integrated graphics - essentially a G55 integrated into the CPU package, not the chipset - are not going to suck this time around. They not only got it right, but gave it the horsepower to, well, stand proudly above those that don't offer bare minimum functionality.
The open question now is not raw horsepower, but drivers. Intel has been saying the drivers would function right for three-plus years now, but it never quite hit the mark. Given the sustained effort it is putting in, they just might get there. The lack of major architectural changes to the GPU also is a potential positive.