According to the Recording Industry Association of America (RIAA):

"The DMCA has enabled consumers to enjoy creative works through popular new technologies," the RIAA said in a statement. "The DVD, iPod and the iTunes Music Store can all be traced to the DMCA. Online games, on-demand movies, e-books, online libraries, and many other services are coming to market because of a secure environment rooted in the DMCA’s protections."

— RIAA slams FAIR USE Act by Eric Bangeman, Ars Technica, 2/28/2007 4:14:26 PM, by Eric Bangeman

Eric Bangeman points out that the DVD actually precedes the DMCA, but "secure" is more or less accurate. Secure in the sense that a traditional newspaper is secure: those pesky readers can’t alter it; they have to read it as they get it. Kind of like the old AT&T telephone network before the Carterfone decision let other companies attach equipment to it. That decision led to mobile phones, the Internet, and other benefits.