The costs of developing and commercializing the components in smartphones are borne by the Android, automotive, and other high performance embedded markets. They just need to make it viable enough to assemble the components and put them in an enclosure.

So it's perfectly feasible to have a small market device like this if the market price covers the cost of buying chipsets off the shelf, and assembling them.

Yes. However, we need to have a modest definition of "success".