Since the only way to obtain a WiiU gamepad is to take one from an existing system, this development will help revive old systems without taking from the limited WiiU gamepad market.
Skip to 2:28 if you just want the development info and not the context and history.
I wish him the best of luck but, given that this Nintendo we are talking about, it is going to be cease and desisted into the ground.
Perhaps, but Nintendo also seems happy to let people forget that the Wii U ever existed. Also, they seem to not care as much about non-piracy/CFW releated hardware mods- take the 3DS capture card as an example, AFAIK it was never targeted by Nintendo since it very clearly was not meant to facilitate piracy.