A few caveats. One, telepresence. You can have the specialist basically be there with you as you operate the probe. Everything gets done in office and the patient doesn't have to travel which can be a big deal in rural communities. I find most urban GPs don't even have a second thought about sending patients off for a scan at some other office.
Following that would be very remote doctors, those that might be labeled as a GP, but basically have to have a ton of specialist knowledge because of the wide range of things they might need to do.
And of course vets, especially large animal vets. Who are already using cool devices such as head mounted displays to view the ultrasound as they generally have their arm all the all the way up an animals rear end.
Telepresence sounds great in theory, but in practice telling anyone, even a physician with a great deal of anatomical knowledge, how to use an ultrasound probe can be frustrating at best.
Also did not know about vets using these new devices, very interesting!