Compared to the communications i have with my more tech savvy friends and colleagues, my patient portal is pretty basic -- not nearly as consumer-friendly as I would like. My primary care doc has had it for several years, during which time it has undergone several iterations. I find it useful to have a record of my test results, medications, and upcoming appointments hand on my laptop and in a mobile app. I can also email requests for Rx refills, though the email functionality doesn't make it easy to ask simple questions (not a replacement for an office visit, apparently). Integration with other healthcare systems and providers is pretty non-existatnt.
In short, I can see a "there" there. But I'm not holding my breath.