I suspect that even if it were an option to get notebook CPUs without integrated graphics, very few models would come with this configuration. Apple would surel

I suspect that even if it were an option to get notebook CPUs without integrated graphics, very few models would come with this configuration. Apple would surely keep the dual GPU setup to maximize battery life via GPU switching when the dedicated GPU is not needed (and Apple gives you the option of only using the dedicated GPU if you wish). Most PC makers would do the same. The integrated GPUs are fine for most notebook tasks, even for power users, and they get much, much better battery life, which is one of the key things a notebook needs to do well. I'm on a rMBP and only my integrated GPU is in use right now because I'm not doing anything that needs the bigger, more power hungry GPU.