Two good examples of complex iPad games today:
The ios version of Xcom is out. From the descriptions and reviews I've seen so far, I understand that the only notable difference from the pc version is the lack of multiplayer? If that's the case then I'm definitely getting that.
+ a very nice update for the King of Dragon Pass was just released which adds quite a lot of new content. I was looking forward to that update, I love that game, and it does seem that, at least for this game, the ios version is definitely superior to the pc one.