If Jobs were still here, he wouldn't end the conversation with tablets, and Apple's market share would depend not only on upgrades to past bestsellers but innovation in under-explored and overlooked markets. Whatever you think about the iPad, it helped to make tablets palatable in a way that allowed for the later Android models you might prefer.
Even though Jobs is gone, I question the idea that the iPad = Apple's market share, however well this iteration does. The assumption is that his successors won't rise to his conceptual level, but we don't really know that yet. Jobs had good taste in collaborators. Gil Amelio wasn't even his mistake.
Yes, Apple's future is a concern in the sense it fuels national growth. But predictions as to Apple's future are dependent on the level of Apple's future inspiration.
What concerns me more is the precedent of Lion and recent iterations of certain applications. It's Apple's apparent abandonment of professional users that worries me. If they do to Logic Pro what they've done to Final Cut Pro, a lot of bitter film and music people who used to dislike ProTools and Avid will be jumping platforms again.
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(People dismiss Jobs for his temper, egotism and occasional dishonesty, but I always wonder whom they're comparing him to -- some less familiar CEO of a major corporation? Why would anyone assume that the famous are inherently worse human beings than the obscure? This isn't praise for Jobs so much as it is cynicism toward our obscenely imbalanced scales of economic power given the reality of corruption. We try to legislate fairness, only to watch the word be redefined legally by the powerful until it becomes its antonym.)