From the Watch Apple links above...
This should be able to do what you ask.
So to say you'd have to wait for a different product from Apple
you should be able to see what it does by date at Apple store.
Hopefully you can find information about other current items
and compare; the Watch looks like another good product
as it also would work with your other recent Apple devices.
See the site link to 'techradar .com' above for other ideas that
are available. By the second week in March there should be
a bit more info, there is a link in the Apple site for Watch...
https://www.apple.com/watch/
A list of smart watches, including Apple Watch (due early '15)
appears here: http://smartwatches.specout.com/
Good luck! 🙂