Optional turn on/off feature for a lit apple logo would be great. Sometimes you don't want to blind the person sitting next to you. However, in the old days it was just a punched hole in the lid and the light came from the backlight diffusor. Nowadays, with the mini-LEDs the apple logo would constantly flash and blink all the time.
If Apple were to put a dedicated screen in the shape of their logo instead, that would make things interesting. Perhaps the logo screen could provide notifications and battery status, just like on an Apple Watch? But only OLED screens are thin enough to consider, they do burn-in and out quickly though. Not really a sustainable feature for an iconic logo.
These days I just put a protective hardshell case onto my MacBook. The iconic logo is covered anyway, which is a good thing, because its shiny surface is a nasty fingerprint magnet.