The broadcasters panel at the HPA Tech Retreat started with updates from representatives from various organizations, which discussed their use of the spectrum for multicasting, Mobile TV and other alternative delivery platforms.

But with no mention of the stereo format, an audience member finally asked the question: “What about 3D?”

Thomas Bause of NBC Uni said that he agreed with David Woods’ earlier presentation “Are You Guys Nuts?,” which suggested that there is still a lot to investigate. Bause added that NBC Uni has not yet determined its 3D strategy.

Fox exec Richard Friedel commented on production, saying that Fox will produce the All-Star Game in 3D this year.

CBS’ Bob Siedel suggested that delivery standards are an issue. He added that CBS is testing the waters, contributing 2D content that will be converted to 3D for DirecTV’s stereo offering.

Jerry Butler reported that PBS is “having some preliminary conversations about 3D. … We want to look into the side effects on viewers.”