Using 15 million BTC to make the math easy, one BTC will be worth 100,000 USD in a fully evolved BTC economy.
You're right on track with Rickard Falkvinge here, although the 100.000 is his low estimate ;-)
btw, found a nice list of predictions for 2014: nr 3 and 4 seems quite realistic from my point of view ;-)
http://crypt.la/2014/03/09/10-professional-bitcoin-price-predictions-2014/