At the very least, better filesystem level compression support. A somewhat common usecase might be people who use emulators. Both Wii U and PS3 are consoles where major emulators just use a folder on your filesystem. I know a lot of emulator users who are non-technical to the point that they don't have "show hidden files and folders" enabled.

Also your average person wouldn't necessarily need checksums, but having them built into the filesystem would lead to overall more reliability.