Square-Enix have also been successfully selling $15 iOS ports of their Final Fantasy series.
Firaxis initially promised separate interfaces for both platforms, and presumably for touch devices as well, but the differences ended up being cosmetic at best.
If you want an example of a dual-platform game with a PC-centric interface, the first example that comes to mind is Command & Conquer.
1. Mobile wasn't taken as seriously by AAA devs, and now when they try and break off to make something for iOS, it's drowned out by:
2. The horde of companies that came from Facebook which are making the games you and I deem as 'meh'. They have optimized the crap out of acquiring users and charting. Good luck if you're a developer trying to make a high quality immersive experience, because no one will find you (unless you have a brand name or lots to spend on acquisition).
3. The reality is probably that the mass market on iOS won't go for more hardcore games. They want Smurf's Village type games...
4. Many of the higher quality games we would want, end up not being done well. Baldur's Gate is actually a good example. I paid for it the first day it came out, and there was a lot of silly problems, related to controls, UI, etc... I loved it at its core so much, but it really needed more work/time :(.