I don't have a rice cooker, but I can get a similar result with my small crock pot, and it's almost as easy.

It does work for generating leftovers, but it still doesn't have quite the panache of the rehydrated takeout :D (What I need to figure out is when to put the other ingredients into the pot in order to get the same effect as I get with leftovers, whether I'm using a slow-cooker or saucepan or microwave.)