Intel is quite new to this whole GPU thing. For them, right now, it's good enough if somebody can see the Windows desktop, watch YouTube and play Farmville. And honestly that's good enough for the majority of people buying these systems. Maybe in the future their offerings will improve.
Intel has been selling GPU for 20 years. Intel is the market "leader" in terms of volume. They sell more GPU than AMD and NVidia combined. If 20 years of experience hasn't caused them to be innovative I wouldn't start holding your breath now.