Judging from the wording here in NJ, my guess is yes it is possible however the definition of "use" and "hands free" may in fact include the watch as a legal device. Since the statute excludes touching the device to active it as illegal, dictating messages to the watch or using it as a hands free appear to just the same as using a regular Bluetooth device. If you follow this statute as a checklist, the watch seems fairly compliant within reason. Would probably be easy in court to have this ticket dismissed if someone was using an Apple Watch while driving based on the statutes language.
39:4-97.3 Use of wireless telephone, electronic communication device in moving vehicle; definitions; enforcement.
1. a. The use of a wireless telephone or electronic communication device by an operator of a moving motor vehicle on a public road or highway shall be unlawful except when the telephone is a hands-free wireless telephone or the electronic communication device is used hands-free, provided that its placement does not interfere with the operation of federally required safety equipment and the operator exercises a high degree of caution in the operation of the motor vehicle. For the purposes of this section, an "electronic communication device" shall not include an amateur radio.
b.The operator of a motor vehicle may use a hand-held wireless telephone while driving with one hand on the steering wheel only if:
(1)The operator has reason to fear for his life or safety, or believes that a criminal act may be perpetrated against himself or another person; or
(2)The operator is using the telephone to report to appropriate authorities a fire, a traffic accident, a serious road hazard or medical or hazardous materials emergency, or to report the operator of another motor vehicle who is driving in a reckless, careless or otherwise unsafe manner or who appears to be driving under the influence of alcohol or drugs. A hand-held wireless telephone user's telephone records or the testimony or written statements from appropriate authorities receiving such calls shall be deemed sufficient evidence of the existence of all lawful calls made under this paragraph.
As used in this act, "hands-free wireless telephone" means a mobile telephone that has an internal feature or function, or that is equipped with an attachment or addition, whether or not permanently part of such mobile telephone, by which a user engages in a conversation without the use of either hand; provided, however, this definition shall not preclude the use of either hand to activate, deactivate, or initiate a function of the telephone.
"Use" of a wireless telephone or electronic communication device shall include, but not be limited to, talking or listening to another person on the telephone, text messaging, or sending an electronic message via the wireless telephone or electronic communication device.