One thing I see happening is that it will be increasingly difficult to get fish and tanks. The reason is on line stores. Everyone wants to save a buck, so we look on line for dry goods. Good deals, perhaps. The downside is the brick and mortar stores, where we usually go to get tanks and livestock are going away. When that happens, where do you go for fish? On line you say? Way more costly and you can't see what your buying. What about tanks? Very expensive to have shipped. right now there are distribution channels that help lower the cost of shipping individual tanks. Those are things I see as problems. You may save a few bucks buying dry goods on line, but you will help put your source for fish and tanks out of business. Belonging to an aquarium society will help with livestock, and maybe the odd tank, but most people don't acquire their hobby good this way. A few years ago, Walmart was the largest aquarium store in North America in terms of total gallonage. They are getting out of it (or already have) and there aren't many LFS
still around. The big boxes like Petsmart and the like don't cutit for the enthusiast.This is more likely to impact the hobby in my view, especially for the average aquarist who keeps a tank or two ( the vast majority) and isn't a zealot. So, while the hobby has progressed in many ways, in terms of improved equipment and availability of fish species, the decline is starting.
As far as a virtual aquarium goes, I would have no interest. As games go, it would be a little boring.