Mujjo, maker of the the best touchscreen leather gloves, has a sleeve for the 12" MacBook you’ll look forward to carrying.
The Carry-On Folio is a beautiful melange of full-grain leather, wool felt, gun-metal hardware, and YKK zippers. Rather than going for the thinnest possible layer of protection (which is what I’d usually prefer), Mujjo let design justify form factor, adding an extremely functional handle so that the Folio is still a joy to carry when it’s your only bag.
The Folio isn’t a replacement for a packed briefcase, but carefully selected pockets will definitely allow for transport of documents, passports, credit cards, writing utensils, and the like.