Spielberg will probably play the same game he played with SD DVD - wait 2 years down the road before jumping on the wagon. It's really disappointing to me that history seems to be repeating itself with high-def DVD. You've got studios split over formats (ala DVD and Divx), those same studios pretty much releasing crap titles, and those with enough clout to call their own shots sitting it out. Let's all do the time warp back to 1997/98, shall we?
Wouldn't it be refreshing to see someone like Spielberg, who certainly shouldn't be focused solely on money at this point in his life, actually embracing and advocating this new technology? Same goes for Lucas, who makes a lot of noise about pushing the technological envelope. It's really too bad that the players in Hollywood always need to be dragged kicking and screaming into anything that improves the home video experience for their audience.