I hope this fails massively and Nintendo start to release games for the PS4 (or PS5).
They have no need to make their own console, it's just vanity. Unfortunately a lot of Japanese companies are suffering from inflexible management and are loosing against more dynamic competitors. And this is just another example.
I'm quite sure they'd sell more games on the PS4 platform than they will on their own & make more money. The loss not getting revenue from the small number of 3rd party game sales would be more than made up by the extra sales of their own games IMO. And wipe the large financial risks of releasing hardware.
I'm pretty sure having Nintendo games on the PS4 would increase it's user base by a considerable %, maybe as much as 20-33%?
They can still continue with handheld devices where they still have a strong foothold, with mobile phone the biggest competitors rather than other dedicated handhelds.
But I suspect they may only see the light when it's too late. :/
I'm sure Nintendo just do what they want, just to **** people off

You've got to admire them really. I hope it's a huge success, Nintendo see this and create a super home console that rules over Sony/MS. I like their consoles, it's always a breath of fresh air with new ideas coming out. Alright, some of their stuff is well just **** but when they do stuff right they do it well.