It looks like Asus will be making some design changes to their smart watches with the launch of the Asus Zenwatch 3.
The current Asus Zenwatch features a square design and it looks like this will change for the next generation device.
The FCC have recently certified the new Asus Zenwatch 3 and below is a label for the device which is circular, this suggests that the new Zenwatch 3 will have a circular design.
We are expecting the next generation Zenwatch from Asus to be made official at IFA next month, it will apparently come with a 5V 2A charger and will support 802.11n WiFi and Bluetooth 4.2.
Source Ausdroid, Android Police, GSM Arena