Cloud is a good thing, but it is pointless buzzword in that context. "Cloud" is when you distribute your stuff over some cluster of physical machines. This increases reliability, allows to scale performance, simplifies deployment and so on. Does it matter to end-user how Google infrastructure's organised inside?
Sure, some cloud providers have compatible APIs (as this is the case with Amazon S3 API), so the data could be moved between "clouds" easily. Compatibility is not a general property of a "cloud", and moreover - this is not a case with G+.
And SAAS is not a "cloud", it's just that nowadays most SAAS are marketed as "cloud" because they internally rely on some distributed storage or processing system. It's just that "cloud" quickly became a buzzword, replacing cumbersome "SAAS" abbreviation.
We've had SAAS in 90's (and, probably, earlier). Remember hosted forums, webchats and guestbooks? This was certainly SAAS, and probably not a "cloud".
Sure, some cloud providers have compatible APIs (as this is the case with Amazon S3 API), so the data could be moved between "clouds" easily. Compatibility is not a general property of a "cloud", and moreover - this is not a case with G+.
And SAAS is not a "cloud", it's just that nowadays most SAAS are marketed as "cloud" because they internally rely on some distributed storage or processing system. It's just that "cloud" quickly became a buzzword, replacing cumbersome "SAAS" abbreviation.
We've had SAAS in 90's (and, probably, earlier). Remember hosted forums, webchats and guestbooks? This was certainly SAAS, and probably not a "cloud".