Like This, But In High Definition.

The "game" is basically a virtual fish-tank in which you can "learn facts about a variety of different species". You can also customise your tank with "rocks, plants, and coral formations".

Of course, as Joystiq note, My Aquarium's not a hit because of its gameplay; it's a hit because it's basically a customisable screensaver. Putting it on the PlayStation 3, where it would benefit from the extra processing of a high-definition system, would only enhance its status as a rad little screensaver.

If it's priced like a dynamic theme, we might actually be tempted.