In Korea almost all homes have heated floors and the entire bathroom is basically treated like a shower. Which I like in some ways. But I really think they should more directly separate the toilet from the design in a separate closed off area. Most of the time it's just a small divider between the showering area and the sink toilet.

But I guess the point of my comment is that the heated floors are awesome and basically standard. Where as in the US that's a luxury and something you have to specifically design into the bathroom. It really avoids that nasty feeling of stepping onto a cold floor. No mat required.