My dad asked in PC World (yeah, I know but stick with me here) for a laptop capable of running World of Warcraft for when my kids stay there. They sold him something with an AMD APU as the minimum that would do the job. So they do exist, they do get recommended, *but* IME most people when asked what sort of PC they want say "laptop" even if a small desktop would be more suitable, and they say "we don't play games" despite the fact that it will have The Simms installed on it within a month
I can't see better graphics as a draw for the average user, as well as it being irrelevant to anyone buying with a discrete card.