SACD, for now, is audio only. There was some talk last year, 9/2003, about the coming of SACD II which would have video capabilities. In that announcement it also indicated that SACD II would not be retrofitted to 'regular' SACD meaning that anyone owning an SACD II player would not be able to play their 'regular' SACD discs on them. That article/announcment made it seem that SACD II was imminent but now that a year has come, nothing has materialized. SONY also wanted to introduce this technology because of growing concerns of the potential pirating of the software.
I guess, stay tuned.
Jim