You are correct. However, there's no way Disney and Warner (and if they join up, Universal and Paramount) won't put BD Live out their discs. Lionsgate, Fox and Sony will likely do so as well. Paramount left Blu-Ray because they were dissatisfied with the lack of interactivity. Warner made it so clear they wanted PiP that they used the extra capacity of Blu-Ray to burn two copies into
T3. Sony and Lionsgate? already released BD-Live discs. It may not be required of hardware manufacturers. (Why resist the chance to double dip?
) However, studios will not hesitate to deploy it.