To be fair to Steve, while thin makes sense (to a point) for mobile systems, it makes little sense for the desktop beyond the current design esthetic that drives this fixation. To be sure, smaller (as in the Mini) is better for many applications, but "smaller" doesn't mean "thin to the point of anorexia" either. I suspect Mr Jobs would not have been impressed by design considerations forcing engineering into too-hot and underpowered products.Well I am no fan of Tim Cook. But to be fair, it was Steve Jobs who started the whole “impossibly thin” craze. Remember this? IIRC, the “impossibly thin” quote actually came from an iPod commercial, but I can’t seem to find it now. Anyway, Apple headed down that road quite some time ago and knowing Tim Cook, he wouldn’t have continued it if it didn’t sell.
As for continuing to follow this path because it sells, there is no choice between thick+just-works or thin+could-work-better in Apple's iMac and current Pro line. A collective worry is that the Mini, if it survives, will follow this trend.