Dwolla has free micropayments (up to $10). Amazon offers special pricing for micropayments (5% + $.05) and so does PayPal (although it requires a separate account). If BTC price goes too high, the dollar costs of Bitcoin transaction fees will get pretty high as well. Anyway, here's an interesting article to read: http://www.bloomberg.com/news/2014-01-02/bitcoin-is-an-expen...
Like others, you seem to be assuming that bitcoin is static and not being improved and that transaction fees won't be lower with continued technological improvements.
