I think the point is that given a set of skills and resources (i.e. Cocoa &#38; great design skills) it's way more profitable (5x in TapTapTap's case) to direct them towards iPhone development.<p>There are different opportunities on the two platforms, but the difference in profitability will absolutely draw some people away from Mac development: it's drawing people away from everything — I know at least 5 ex-Java or .Net guys doing iPhone development full time now.<p>&#62;  it wouldn't be long before the majority moved back to the Mac when the iPhone Dream didn't materialise.<p>It might be less competitive, but it's not like Mac development is a sure bet that you can just fall back on.