At those prices it better help me catch more fish. I've really only enjoyed 2 things in life fishing and sex and the older I get the more I like fishing.
For me the touch screen part is not my favorite of the new HDS. The usability enhancements, the all integrated electronics, from reading the website I believe the units have either wifi or blue tooth in them but not utilized yet, and the Insight Genesis mapping (lets you record soundings and have chart created) that is what I like.
The 7" model could easily be moved from a flats boat to a kayak to an offshore boat. With the integrated electronic of the new models it only requires a power wire and transducer wire and you have all the very latest in sonar/chart plotter technology. With the BT/WiFi opens the possibility for andriod/iOS apps this would let you view unit from anywhere on the boat. Have local lakes not mapped by the big companies, the Insight Genesis mapping would allow you to create a detail 1'ft contour chart over time as you fish the lake. For 1600.00 that is a lot for the money to me.