After spending 6 weeks in South Korea recently, I can attest to the comfort factor. I remember the first night at a hotel after a 12 hour flight and waking from a deep sleep. I found myself walking across a cold tile floor and then sitting on a pre-warmed toilet seat. I would have to say that it was something of a luxury, however it was nice and something I could get used to.
I got a bit of a surprise after pushing some buttons written in Korean while I was trying to flush it!!!!!!!!!!!