Maybe not. It would still be useful in applications where slow motion is used as a tool. IQ is not that important under those circumstances. For example, in a lab or something like that. A $5k price tag is normal for equipment like that. Some people I know have a small company that makes (among other specialized scientific equipment) a high pressure press that makes very small nanospheres. The construction is quite simple, basically a small steel chamber containing a filter and connections to a pressure source. They sell it for about $2.5k, and sell enough a year to generate around a million a year in revenue. I think this camera could generate much more revenue than that if it is marketed correctly since it would have more general application than these presses my friends make.
There can be a surprisingly significant market for a company that sells small specialized pieces of equipment to individuals or organizations that use video professionally as a tool but don't produce video of consumption. They may not sell many of these cameras to US the enthusiast, but that doesn't mean they wont sell many cameras. The big issue they will have is not so much their product, but marketing to the right people who might use it. If those folk are not aware of the camera, they won't buy it.