Luckily there's an increasing number of use cases that no longer have a want for more than Intel - I've been impressed just what the HD 4000 in my new laptop can do. Sure, a nVidia GPU still kicks its butt pretty thoroughly, but there's a lot more that works acceptably than there used to be, and it looks like Iris Pro will be a significant improvement on top of the current gen. Unfortunately it also looks like the wall they're going to run into after they leap over the performance one might be legal rather than technical (e.g. Mesa for Intel implements OpenGL 3 now, but due to Red Hat legal having problems with the patent coverage on some of that stuff Fedora won't actually ship all the bits, etc.).