Under development, but its great!
The picture shared on the tweet suggests that the app will use Wifi connectivity to sync data across devices.
Whatsapp may also provide data option for them who does not have Wifi.

As of now, we cant use Whatsapp on any other equipment except on one phone.
And no one can use two Whatsapp accounts on one gear.
But few Android phones have dual app support to use two accounts.

Once the feature is ready, it will be coming to beta testing.
This feature will be very helpful to parents who want to check out the conversations of their kids.
And all the boys need to be active as now their girlfriends can use their Whatsapp on her unit.

So guys be careful once the feature is out.
