Signal K sounds good for most things listed. The governments and insurance companies can benefit too, knowing where you are and how your boat is functioning, like speed over ground, holding tank levels, how often the bilge pump is running, fuel consumption, etc. This could make it easier for them to enforce laws or adjust insurance premiums. Maybe there will be a future requirement for all boaters to scan their UPC's into the system too - things like safety equipment on board, new replacement parts or maybe food items or beverages purchased, etc. This will enable you to never miss an expiration date on a flare or the sea sickness pills. Also it will be good to get lots of advertising and market survey pop-ups that will show up on your displays and interrupt your navigation/weather info. Hopefully that stuff won't happen, but....