This will be really interesting for brain imaging I think -- particularly for non-penetrating trauma (blast, crash, falls) in environments where MRI is unsuitable/unavailable, or where potential injuries are very common and thus per-scan cost is critical.
If you scanned every American Football player before/after a game, it would probably lead to an end of the sport. Similarly with boxing, and soccer heading practice.
Also would be super useful in war zones -- you can't MRI due to metal fragments, and can't CT over and over again due to radiation, and right now most of the guidance is "don't get injured again" and is broadly ignored. Being able to scan people near point of injury (or just after high risk activities) would be great.
(Obviously lots of other uses for this in disease screening, etc.; difficulties with ultrasound due to bone, gas, etc.)
It will be terrible for brain imaging. The ultrasound waves can’t go through the skull and thus can’t image the brain. Additionally you would have to drown the patient since you need a medium other than air between the ultrasound emitting probe and the body which is water in their device.
CT is more than sufficient for imaging the brain in a case of trauma and MRI is not automatically better than CT in every case.
(I am a neuroradiologist)