subscription services such as the various weather uplinks in the U.S. just won't occur here,
Satellite weather is here; all you need is the $15K data link option in your $600K Cirrus and pay $60/month for the privilege!
the market ( consumers) is too small for commercial viability.
People once said that about that market for iPad EFB apps in Australia. Now look what we have and how well the developers are doing with it.
Anyway, where the bad weather occurs in Australia and NOTAMs matter, you are generally never too far away from a Telstra tower, so get your weather and NOTAMs that way.
Traffic I guess will never happen here. The majority of flying is VFR in G and without a requirement, nobody is going to spend quite that much money on equipment that only has value if everybody else buys it too.