Marcin Iwinski of CD Projekt RED has explained to Eurogamer.net that
The Witcher 3: Wild Hunt will not have exclusive content on any platform, and that no such announcement will be made during the next E3. According to the findings, in short, all players will have full use of the title without having special privileges in content or hours of additional gameplay. We look forward with confidence to see during the Los Angeles show, which you can follow on our pages in real time.