In most implementations, neither Cerner not Epic encourage structured data recording except for billing codes. This means that if a patient comes through the medical system frequently, doctors have to read pages and pages of unstructured text to get a sense of what's going on for the patient. The software is designed to be sold to administrators and, as currently designed is unquestionably leading to worse outcomes for patients.
Google has made a lot of mistakes. If they build something doctors truly want to use and that helps properly organize information, however, and if Google doesn't misuse the data/people aren't unreasonably paranoid about data misuse, it will be a godsend for the industry and it will save lives.
We haven't even begun to talk about the potential for machine learning and statistics to understand what treatments are most effective if data are structured properly. This is unquestionably an interesting and unique case where collecting massive amounts of data and handing in to a trusted, competent, creative, research-oriented authority could have incredible benefit for mankind. I don't trust Cerner or Epic with this mission for a second.