Would be interesting to have but the concept rapidly falls on its face when you consider how little internal memory you have to work with for the home directories on the 770. Another complication is the fact that this permission separation completely breaks down on the removable FAT32 media. While this is a problem shared with removable media on desktops too, it is worse on the 770 since it depends more on that removable storage to hold the majority of the data.

So while it would work, it might be an awkward fit.