And it's not true of either company in general, either. AMD's lower-end APU chips do have integrated graphics, but their higher-end CPUs do not. Similarly, Intel's Sandy Bridge-E (LGA2011) chips do not have integrated graphics either.
Which makes total sense. AMD would rather you buy a more expensive discrete GPU if you purchased a higher end CPU. But that's just good marketing since the people buying those high end CPUs probably don't have much of an issue with buying a video card as well. Intel doesn't care if you buy a discrete card since they don't chase that market but it does care to have the marketing bullet point.
Intel's lower end chips may not have a GPU built in but I would imagine that's intended for a market where it doesn't matter.
But I'm still willing to bet that almost all computers sold today have a decent video card in them. I can see my statement as it was is a bit much since I was implying that all AMD and Intel CPUs have GPUs built-in, which obviously they do not. But I'm sticking by my thought that almost all computers sold today would have a decent video card in them. All of them may not be able to play the latest and greatest games but they can go a long way with the rest.
To me, in today's market, if the computer doesn't have a decent video card then it was built for a specific function in mind and gaming is more than likely irrelevant.