Apple did not announce updates to its smaller notebook machine, but it did quietly remove the Rose Gold color as a purchase option. The 12-inch MacBook can now be purchased in Silver, Space Gray, and Gold, but not Rose Gold.
It's not clear why Apple has removed Rose Gold as a color option, but no other Macs are available in the pinker shade, suggesting the Rose Gold color is out at Apple. The MacBook Air, like the MacBook, can be purchased in Silver, Space Gray, and Gold.
Apple does not appear to have made any other changes to the 12-inch MacBook and its future is somewhat unclear with the addition of a powerful $1,199 MacBook Air with a Retina display.