Have just discovered the following site:
https://www.cryptohome.us/It's just a real estate listings site, but every listing accepts payment in bitcoin.
If you click on "inventory" and scroll down, there are some really nice Florida homes listed for several million dollars...
I think a major issue with this right now is most people would be converting fiat in to BTC for such a large purchase and without a way to convert fiat to BTC for low commission at a fair market rate they will be better off just paying in FIAT and paying the fees to their bank etc. In an ideal world we will one day be in a situation where btc is that much cheaper to use that there are even advisors and such who recommend it.