Haven't heard anything about this in a long time. Seemed interesting when i first about it.
Don't know much about it, so i'll just say the following:
I heard a Nintendo representative say that Nintendo was betting on these type of experiences.
This was said last year, after Switch launched, if i'm not mistaken. And when i heard this, i thought he was talking about 1st party games. Guess not.
All these games seemed to corroborate what he said, and to be honest, i think it's the first time that Nintendo is in with the program, as in, Nintendo is trying to follow market trends.
Amazing change for Nintendo, to say the least.
I sincerely hope Nintendo does something like this themselves.
Ports are good, but they need exclusives to bring more people into Switch (future consoles aswell).