The 3DS HOME Theme shop in Japan has plenty of additions every week, a number of which will never make it to the West. Some feature boy and girl bands, amazingly, while others are for titles that haven't been localised yet, but can sure be pretty to look at.
This is an example that we think will make it to the West though, as it's a reproduction of the awesome original Super Mario Bros. artwork. It's pretty much the perfect theme to have on your 3DS for the 30th Anniversary celebrations.
We'd put decent money on this one coming to the West; will you pick it up if it does?