The DRM industry should hope that the ISPs lose. If they do, then that means that ISPs do not have a free pass around liability for their treatment of content, and therefore that they should be proactively offering DRM services, both to protect themselves legally and as a source of incremental revenue from copyright owners. If the ISPs continue to win these cases, then a major segment of the digital media value chain that could support DRM technologies and services may disappear.
Remarkably honest reporting by DRM Watch here. The DRM 'Industry' has a vested interest in destroying the free transmission of information over the public internet in favour of closed, restricted networks.