What’s astounding is that Apple’s engineers managed to cram four times the pixels of the previous 15″ MacBook Pro into a display assembly that is (nearly) the same size.
What we can tell you is that if anything in the display assembly breaks, you’ll need to replace the whole thing. It will be more expensive than just replacing the LCD inside a regular MacBook Pro, but it will also make the choice (of whether to replace just LCD or entire display assembly) very easy.
Basically, Apple engineers did an awesome job, and also, if this thing breaks, take it to a repair shop because there is no way to do this by yourself. Check out the process.