Your summary appears to ring true: Google's cloud strategy leverages their existing strengths and Apple's cloud strategy leverages theirs.
Lack of surprise: Both expand the computing paradigm to increase each company's revenue potential.
As with any market, user adoption (revenue) will sort out which "wins" in the long run. If either, or both, cloud paradigms are useful to a significant number of people, they will thrive and each company will work to further expanding their paradigm and their revenue.
One thing that may be lost in the increasingly pervasive "cloud" is that your relationship with the cloud is intended to be forever. For individuals, businesses aside, people will need to decide whether the value these services provide justifies the commitment to pay for these services for the rest of their computing lifetimes.
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