It looks like we know what all of those updates do now and there's a big update in October.
I will likely go with the Zelda one even though there all cool.
PR email wrote:New Themes for Nintendo 3DS HOME Menu: Following a system update in October, Nintendo will be introducing new Nintendo 3DS HOME menu themes that change the menu background, icons and folders, and music and sound effects. Themes will be available for purchase from a Theme Shop that will be added to the HOME menu. More details will be announced in the future
I will likely go with the Zelda one even though there all cool.