The option of a cloud based version of AC makes a lot of sense to me. The key word being "option" (it would certainly not be my choice). There are good reasons to have the program in the cloud, and there are good reasons to have it on our own machines. So long as we get to choose, everyone wins. I think (and hope) that Jon B is saying is that a cloud-based version of the program may be offered to those who choose it.
His post also mentions a "single, turn-key" service which implies that users could sign-up and have appropriate hardware delivered to their offices, open a browser, and begin using the program. I think that concept has a lot of appeal to prospective EMR users who are wary of the knowledge needed to set up their own network, etc., and may not want to deal with many of the IT office issues we all deal with daily. One important factor will be the choice of a knowledgeable, trustworthy, and reliable service provider to handle the product.