Probably the only way to succeed would be to find an OEM or ODM willing to build the thing, then do a Kickstarter like campaign to gauge interest. Doing it you

Probably the only way to succeed would be to find an OEM or ODM willing to build the thing, then do a Kickstarter like campaign to gauge interest. Doing it yourself would be way too risky. But be prepared for the big guys to absolutely bury you once you show any inkling of success. I think it's a great idea, but I can see why nobody has tried the space. I sure wouldn't.