dhanishdee - It sounds like a new idea, that is for sure!
I have seen the watches that contain TWS earbuds, but never a phone that contains a watch? - What was the inspiration for this idea, after the want for a watch for very select events?
For me, I don’t know how useful it would be, it would make the Phone itself a bulkier device, whilst taking away space for battery and other useful internals, from the phone. Plus, I utilise my smartwatch, mostly, for health tracking, which is only possible once the watch is touching my skin, it seems that it would be wasted being stuck in the back of a phone.
That being said, I love the idea of a secondary display, for viewing the time and some overview of notifications. Just not necessarily having this as a detachable smart watch, as well as. But love the creative idea!