I'm anxious to see what happens down the road also. I already use a 998 and 1198; donated my 797 to son-in-law. Most of the map cards for HB pertain to lake or salt water fishing, but I use my units in local rivers a lot also, and there isn't much available with adequate detail for those inland areas, in fact some of the places I go don't even show that there is a river, at least on the basic mapping option. I started to purchase a 597 yesterday for my grandson to install on his high-dollar duck hunting boat, but realized that the mapping options available didn't justify retiring the Eagle unit he has with one of my Lowrance Map Create cards installed. He wants to upgrade from grayscale to color, but right now we're deciding what is the best option. He likes the display size and color of the 597, but needs more detail in the cartography area.
I am forced to also use Lowrance units in my other two boats, primarily for the mapping options, and would love to see someone either create cards for the HB, or a program that would allow us to create our own.