There is some sort of new in-game connection device called the C Gear. It has “various connection capabilities,” though we do not know what that means at this time. To the left of its screenshot below, the magazine says, “What’s this screen!?… It looks like a new wireless feature was added!”
There is a new wireless feature called Random Match, which you can access from the Global Terminal inside Pokemon Centers. It will allow players to randomly battle other players around the country over Wi-Fi. It then says “You can upload your Black and White save file to the Internet,” though for what purposes we do not know at this time.