The next
Witcher game will come not only for the PC but for the PS4 too, said CD Projekt. And of course for all next gen consoles. Simultaneously. So await an XBox 720 announcement soonish.
Current gen consoles aren't mentioned, but CDP would be stupid not to bring it at least to the XBox 360.
Found on
GamersGlobal, but other sites also ran this.
More information.