I don't really look at it as a symptom of lack of graphics throughput, but more as a benefit of eye tracking, which is also potentially something that benefits, say, the immersion of others through portraying your facial expressions more realistically, or something to that effect. You could also use it as a kind of peripheral for games or software, and apple currently uses it as a mouse, so it's not totally useless. But I also can't imagine that most developers are going to be imaginative enough to make good use of it, if we can't even think of good uses for basic shit, like haptic feedback.

Perhaps it breaks even in terms of allowing them to save money they otherwise would've spent on rendering, but I dunno if that's the case, since the camera has to be pretty low latency, and you have to still dedicate hardware resources to the eye tracking and foveated rendering in order to get it to look good. Weight savings, then? I just don't really know. I guess we'll see, if it gets more industry adoption.