The most notable improvement would be the inclusion of digital certificates much like online purchasing over the internet.
According to the article posted on CoinDesk,
" In the new system, the customer will send their payment to the merchant, encoded with extra information, including some of the information in the payment request as a reference, along with a refund address in the event that the merchant needs to send funds back. "
This will go a long way to improving the ease of use for Bitcoin and continue its adoption into the mainstream commerce engine...especially online.
CoinDesk Article - http://www.coindesk.com/merchant-friendly-payments-less-than-perfect-but-better-than-before/