Hitachi Maxell has announced their new 8cm DVD+R DL and DVD-R DL media. Developed for camcorders, these discs can hold 2.6GB of data or 54-55 minutes of standard quality video. Here's part of their press release, translated from Japanese:

Hitachi Maxell, Ltd. (The execution post president: Yoshito Kakuta) will put the series, 8cmDVD-R DL disk, and 8cmDVD+R DL "Easy selection" disk for the DVD video camera with the recording layer in two layers in one side of the disk on the market on November 24.

The market expands to the DVD video camera in the background of convenience that makes the best use of the feature of record type DVD like the height etc. of the random access and the reproduction interchangeability. Needs of "Take a picture for a long time" and "High-resolution taking a picture" expand more than before with the extension of the group of users, and the disk where it answers this is requested in recent years.
According to AV Watch, Maxell's 8cm media is expected to cost about 1300 Yen. More information can be found here.