There is a lot of action even in the US regarding the set-top box issue, so we're not even near what will be the final outcome there, especially with those that do movie rentals, game delivery via the net and even the net itself, and other technologies that are just beginning to show up. In fact, they expect to sell 11 million TVs that will be Internet-ready next year alone, they'll sell somewhat less than that this year because many models will be released later this year.
That won't completely take away the need for DVD or even Blu-Ray, or a couple other things though.
But for the 'net, in the US there is an FCC proceeding aimed at making things more available on more devices, especially video content but that could well include audio and other media as well. Also there are already devices that along with smartphones and PCs including laptops, netbooks, and tablets like the iPad, will handle video and audio. And some hardware manufacturers are including Internet audio services in their in-dash units as well.
We will still need DVD for many applications, including some managed content within the Church, but many common general membership things can be done both ways, although eventually the web will be a larger way than DVD. The other reason we'll still use DVD is in areas where the Internet is not as prevalent or as easily available like in developed countries.
And I would note one other thing appears to be dying out that we may not be thinking of either, and the iPod has been the reason, 'bookshelf stereos', sometimes referred to as 'box stereos' or other names, are also starting to disappear. A recent survey I did of six Walmarts shows they are either gone or very few models are left compared to just last year. The replacement is iPod docks, and similar things. The truth is, home theater, iPods, etc., are changing the way we listen to and store music, or view video, or even using the net.
Digital is a 'game changer', and in the develpod world it has already brought about some things we need to be thinking of in as little as the next year or two, other things will change over time as well.