Firstly, there is an excellent explanation of SOPA’s potential impact here. Check out the video in the first link.
What is so striking about this, apart from the breath-taking over-reach of the bills, is the about-face in Congress as a result of the Internet strike. This is the latest example of the Internet providing citizens with the means to have their voices heard. Other recent examples include Verizon backing off a $2 bill payment fee, Bank of America dropping a $5 debit card fee, Occupy Wall Street and the Arab Spring.