Yes, the latest data says 93% of hospitals have some level of EMR installed. Now, that doesn't necessarily mean use is widespread, of course. Nor does it mean hospitals are fully leveraging this investment. But it's a good foundation. Physician offices have much lower adoption, unsurprisingly. Personally, I think the availability of cloud-based EHRs increases the odds of faster EMR adoption within practices; it's easier, often more affordable, and requires less internal IT knowledge.
As you say, Ariella, now hospitals have EMRs in place they're digging in to the data to try and discover new ways to reduce costs and improve care. (I'm writing a story on that later today, based on the Crimson conference I attended late last week.) Once you've invested so many resources into such a massive data repository, you want to fully leverage this amazing asset!