Update 10/28/13 10:30pm PT: The update is rolling out now (thanks, bdh and ohbuckeyeman!):
Samsung has added details about the upcoming I545VRUEMJ7 software update that will, among other things, make the device compatible with the Galaxy Gear. That means anyone who ran out and purchased the watch before discovering that it was only compatible with the Note 3 can now breathe a bit easier (I'm sure at least one person did that, right?).