Having spent a fair amount of time in Japan with the "hyper-advanced toilets", I would kill to have those easily accessible where I live now (South Africa).

Not only did they leave my bum amazingly clean, a packet of toilet paper literally sat there and gathered dust.

I think that there is a lot of tech in Japan focused on quality of life improvements that just sits in the background. Perhaps given the aging demographics of the society, this is a good fit.