If you are only going to use it docked, there is really no point unless you want wired ethernet, and even then you could just buy a new dock. If you are going to use it in handheld mode, then the extra $50 is a no-brainer. The bump in screen size and having an OLED screen instead of a LCD one makes a HUGE improvement when it comes to visuals, especially with how crisp the OLED screens are.
All in all, if you are only using docked, there is no point. If you are using it as a handheld, it's 100% worth it.