Hori has just announced that it will be releasing a wired microphone for Nintendo Switch in May. I’m not quite sure if there’s already been a karaoke game released/announced for the Switch (in Japan at least) but I don’t doubt that one will come eventually.
https://twitter.com/japanese3ds/status/963647862885224449
What’s even odder though is this mammoth “microphone cover” that’s also releasing alongside it. I’m not sure if it’s common in Japan for these to be sitting around Karaoke bars, but boy it’s a funny looking thing.
https://twitter.com/japanese3ds/status/963648347885178881
If these are your thing, they’ll both be coming out in Japan. The Microphone at least will probably make its way over here but I’m not so sure about the cover.
