Great post. Pre-Square, every taxi I was in complained about taking your credit card. Now, every taxi driver happily pulls out their Square to take your credit card. Ridiculously seamless. Plus, people at farmer's markets, etc. can easily sell more because they don't just have to take cash. Square also pushed big players like PayPal into the market to create poorer/more clunky products that just shed to light the possibilities and are helping market their market.
3.2 Billion Valuation? Wow Founded in 2009. Very impressive. How long till their margins get squeezed?