OK, we will ignore the other two nutters for a bit. Who said anything about weather radar?
Bas, how true! Avidyne had a demo a number of years ago on satellite wx for Aus. Pretty exi when you look at what is available for smart devices with a broadband connection.
As far as traffic, it will always depend on widespread fitment. However, as an aid to mark1a eyeball, any little help is good. That GDL39 is looking good for that application.