And a bigger hard drive. And yes, it would hurt Apple's profits if they put additional costs into a notebook without adjusting their price. It's called a margin and Apple runs them pretty high, something that has allowed them to thrive with an extremely small market share. If you are trying to argue some philosophical argument that Apple doesn't "need" to charge what they charge, unfortunately, right or wrong, it doesn't matter. Business is business and Apple has obligations to their company and shareholders to generate net operating profit. And they do a damn fine job at it.
What this means is that if it costs more to produce something, it will cost the end user more.
Maybe pro photographers or video editors might, but I doubt the average consumer is going to pay an additional $700 just for a screen that they most likely couldn't discern a noticeable difference with. Maybe a few people have, but do you honestly believe the average consumer is going to pay $700 for JUST the screen?