As others mentioned Binance is just separating their global exchange from USA and starting a separate exchange that comlpy with US regulations. It's not a ban imposed by the US government. Just a strategy to on-board USA traders by complying with USA regulations through their new US site.

I assume that there will not be IEOs in USA site as well as some other tokens that can be classified as security tokens. Furthermore, there may not trading competitions as well. However, Binance may accept fiat deposits and withdrawals for USA customers with the new USA site. We all know that accepting USA customers legally means Binance has to adopt those changes to those customers and personally I don't see it as an issue.