All internet nude pics, magazines, and video streams can be loosly defined as interstate. According to the Adult Industry, the 2257 law cited in this article will very likely shut down the entire industry. Max Hardcore is the first test of the law. Moving the industry out of the country is rapidly becoming the school of thought as the only solution to avoiding liability and severe imprisonment. Looks like people will be watching Disney movies in late night hotel rooms.
But "loose" definitions of interstate commerce are exactly the problem. I agree with Justice Thomas that what is needed is a return to a limited, tight definition and use of interstate commerce enforcement.
I don't know, however, about how that works with the Internet...maybe the answer there is for local communities to decide what level of commercial porn production or site hosting they want to allow? That wouldn't prevent people from downloading porn in their own homes, of course...but it would prevent internet porn producers from taking up residence in their communities, IF that's what they wanted to prevent.