The Mk3 family looks quite impressive. Any thoughts on which features will trickle down to G1, Mk2, Mk2s, Mk2i, and Mk1 via update? One would think that Mk2i with T1 can handle some, though perhaps not all, of the improved diver-to-diver communication features. All the Mk-series watches ought to have access to the dive site database, as they handle mapping in the surface context quite well. All of the watches, including G1, ought to be able to provide a dive ready score since they have optical heart rate monitors and provide training scores for other activities and outstanding general fitness advice. What do others think? What features will trickle down from the Mk3 family to other Garmin dive watches?