I don't think there will be another Nintendo home console unless Nintendo's R&D can come up with some Wiimote like miracle idea.
Rising dev costs each successive generation and Nintendo being stuck in the 15-20 million only userbase just doesn't make sense financially for them. Its expending tremendous effort on Nintendo's part to try and squeeze every drop from a very small market, I think they are done with that after the Wii U.
So yes, I do think the QoL thing is a way for them to hedge against a possible exit from the traditional console business. Their next portable will be their main gaming platform IMO.