> Steve Jobs and Scott Forstall had a huge advantage, they only had to care about a 320x240
Honestly this isn't a big deal it's massively overstated. OS X managed to pull of Aqua and MS managed to pull off Aero both with arbitrary UI sizing.
I feel this point is only stated by people who came to UI when they only had to worry about 1 size and then were shocked at the idea of treating the UI as anything other than a Photoshop flat.