Google Glass - template for a Google smartwatch?

Today when I saw Google's beautiful implementation of transit information on Google Glass, I thought maybe a lot of the UI work done for Google Glass could translate quite nicely to a watch on the wrist. I would love a smartwatch that indicates wait times and wayfinding information while I am on public transport. With all the work done on Google Glass, Google now, Google maps, and the moto X's Motorola Assist feature Google could be in the unique position of creating an amazing location aware, dynamic, simplistic smartwatch that pairs with a phone that would smash the smartwatch concept out of the park.

http://www.theverge.com/2013/10/7/4813470/google-glass-adds-public-transit-directions

What elements of Google's and Motorola's portfolio of services and technologies do you think they could use together to make the perfect smartwatch?