The things you are mentioning are never going to happen. Period. It is at the bottom of the barrel for implementations, and since this hasn't been done on even any other console/platform is just won't here.
Search up OpenEmu if you want a great emulator with amazing gui I'm sure your kids will love. It's actually gorgeous, does every major emulator, is open source, and is completely free. It's got lot's of filters and native controller mapping too. Looks something like this I love it, and you'll never look to another emulator again. (not to mention it's 100% drag and drop roms, all the artwork and metadata is pulled automatically for you)