I have stated for a number of months that bitcoin is not too expensive or two slow a network for transactions. People need to realize that the coffee purchases ie credit and debit cards, account for only a small percentage of the total money transacted (in terms of dollars). When you look at a building like this selling, that is a lot of cups of coffee.
So is BTC too slow and expensive for this? Do you think the people involved cared about a hundred thousand satoshi as a transaction fee? Or did they care that it took a couple of hours to complete? How long would it take a bank to clear that much money and what would they charge? 5%? 3%? Whatever the number, it is a lot more than BTC.
This is also great news. The more we see Bitcoin being used in transactions, the more "real" it becomes to people. There will be millions around the world who will read this story in all the different publications that write about it. To them, BTC might have been something mysterious, now it is less so.
People will start seeing this as a viable alternative and actual payment method.
That can only help in the acceptance of cryptocurrencies in people's minds.
RE: Tokyo Office Building Sells For 547 Bitcoin