I've been telling iOS-using friends for two years now that Aquaria would make for an ideal iOS game. And here it is, but not for my device
Will Aquaria gain iPhone/iPod Touch support, devs?
(With everything from RTS games, realtime MMOs, online beat-em-ups, multiplayer 4X games, competitive multiplayer fps games, titles with extremely complex interfaces (Dungeon Defenders), and even a twitch-based space shooter MMO, all for touch screen devices, we are well past the "can't adapt interface/gameplay to small screen" argument
(Last time I ran across this reply from a developer was with Small World, a game that would work extremely well with pull-down menus on an iPhone screen.) So, unless developers judge that a certain game would not actually sell well enough to justify the porting process, or that they just don't care enough
, I can see no reason ever to release a game for iPad alone.)