In America it is about cost, and people not really being aware of what is available for the bathroom.
It takes years for new technology to catch on in bathrooms and it usually has to come from the contractors putting it in new houses.
One of the most wasteful trends in bathroom technology that I have ever seen was the oversize Jacuzzi tub, it was rarely used and generally came to be a place to water or store the house plants.
People will love heated seats and modern toilets, when someone starts installing them as standard in new homes.
I'll take expensive, quality, and simple over complex at the same price. You won't even get me to look at cheap and complex, as all I'm thinking is “trouble”.
If I had backside issues, a bidet feature might interest me, but I don't and it doesn't. Its not that I've never had the experience, its just that I don't value it.
Warm seats? No thanks. I'm just doing my business and then I'm moving along.
Next thing I know, you'll be trying to sell me toilet paper without the bark in it ;-)