So the proof is in–informed medical decision making at the point of care for physicians works and they like it. A very large sample of physicians (over 5,000 surveyed, out of 55,000 clinicians who could access the system) were given a point of care information system. 63% of them knew about it and 75% of those, used it. 41% of those users reported that they directly improved patient care they delivered by using the system. (The results are in the abstract here).
The only reason that this isn’t sweeping American medicine as we speak is, of course, that the system is only available in Australia.