I've been to the RSNA, am involved in healthcare software in the USA, and seeing what companies like Phillips, GE, et al, spend on floor space at this conference, it seems difficult to imagine these companies yielding their market position for cheaper machines to reduce costs. MRI equipment is huge business (these companies don't bat an eye spending $1,000,000+ for a conference such as the RSNA because this is where they wine and dine and make every hospital exec feel "special" so when it comes time to buy x MRIs, the sale alone will pay back the conference cost 10 fold. These conferences are expensive. The sales pipe is long (and thus expensive).
There may be companies creating and selling these, but the heavyweights don't like losing a market opportunity in "their" hospitals. I'd be very reticent to think there will ever be lower costs in the ER for offering said device/service.
Please don't get me wrong, I'm excited for limited use machines that can provide the basic information needed at a fraction of the price. I'm very leery of US healthcare institutions making a rational, patient-friendly cost conscious decision.