"New" is relative. For a cultural phenomenon they are fairly new. I grew up (at least in part) in Japan and they were still predominantly using different toilets. I preferred western toilets and wouldn't use the traditional Japanese ones.
There were already a lot of western toilets, and there were already things like heated toilet seats but the wholesale transition to western toilets with gadgets as a cultural phenomenon is not the same as a new gadget coming out.
Do you know of any other countries that have had such changes in the way they use the bathroom within the last decade?