Each of the machines at my (large academic) hospital is used for 8-12 transthoracic echocardiograms every weekday, or ~2,500 times per year. An average ultrasound machine cost $140,000 in 2016 (per [1]). If we assume that the machines last 3 years (so far I can tell you that they last at least 5 years, but let's be conservative), then the hospital gets ~7,500 ultrasounds for $140,000, so just under $20 of the cost is attributable to the machine. According to Choosing Wisely[2], the average cost of a TTE is ~$1,000. So, only 2% of the bill seems to be attributable to the price of the ultrasound machine. So, at least at major academic medical centers, the device itself probably won't make a huge change.

I could imagine the standard of care changing, however, and that might make a difference. If cheap ultrasounds become ubiquitous and more physicians are trained in their use, the use of ultrasound among generalists might increase, freeing up specialists to take a more narrow focus. I could see this technology being particularly useful in emergency and critical care settings.

1 = http://www.modernhealthcare.com/article/20141216/blog/312169...

2 = http://www.choosingwisely.org/patient-resources/echocardiogr...