"While our position on mobile phones is that we ask people to put these away when the film is playing, with wearable technology – whether Google Glass or otherwise – we believe that it is generally more difficult to detect when they are and are not recording, so our approach is a precautionary one."
Huh? Google Glass has a light to indicate that it is recording and despite the idiots claiming that the sky is falling down, that they will punch anybody wearing one and that the google mothership is monitoring everything a google glass wearer sees, the google glass device doesn't have the battery or storage capacity to record for long, or in any particular good quality. On the other hand, my mobile phone doesn't have a light to indicate that it is recording and has the battery and storage capacity to record video for two hours and can record in very nice quality.
Go figure. More knee jerk reactions by the clueless.
On the other hand, wearable technology will only improve it's capabilities therefore at some point it will be possible to record two hours of dubious quality movie video using a wearable device, but having specific rules for specific devices is just stupid. It's already prohibited to record the films, why are new guidelines needed? Also as noted above, cam copies in cinemas aren't the real risk to a film's distribution.