3840 by 1024 pixel screen?
Well, see/read yourself:
http://www.dreamaquarium.com/forum/viewtopic.php?t=2227
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Do not be fooled by videos on youtube abvout DA, for some reaosn unknown to me they all are more or less stuttering. I can assure that in reality the fishes move smooth as silk, with varying speeds, and quite natural movements. The general "pace" of a tank can be set on a scale of 5 or 6 settings. Several other things can be tuned or randomised, too: Auto-rotation for tank been shown in sequence, where the blubbering air bubbles show up, sound composition of air bubbles, feeding fishes, different camera angles including "follow fish", designing own tanks with 2D photos as background, and no foreground 3D objects...
And since the latest update even - fish poo.