What additional features will iWatch have compared to the 6th-gen iPod nano?

[rMBP13]

Looking at what the 6th-gen iPod nano can do, I really can't think of any additional features that can possibly be added into the rumored iWatch... Can anyone tell me, what's likely to be in the iWatch?

http://www.youtube.com/watch?v=5xa_GUzTb00

 

[mobilehaathi]

Assuming that such a product actually exists at some point in the future, I'd bet good money on it telling time. Anything beyond that is pure speculation, including its mere existence.