I don't know. Maybe.
I guess it depends on who "companies" is.
I think they (the studios, and the bigger corp owners like Sony) are still hoping to foist Blu-ray on us, since so much was spent there.
The whole reason Toshiba left HD-DVD without more fight was because they wanted to spend their monies on the SS tech. That's how they've spent their time these past couple of years, after abandoning HD-DVD so early into the "war" that never had more than 2-3 small battles.
They could launch SS now, but DVD still has a decade left in it. The pre-recorded media is where the $$$ is anyway, not the blank opticals. SS is already being used in production and recording -- video distribution is the only real untapped market still left.
Pre-recorded leads the charge, recordable follows later.