Sony recently announced they are developing a new type of blue-violet ultra-fast pulsed laser for optical disks that would increase storage capacity up to 20X of current Blu-ray Discs.
This means that a blue-violet based disc could hold up to 50 movies or an entire season of a TV show on one disk.
The adoption process for Blu-ray is going at a snails pace, so I wouldn't look for this technology to come any time soon. Just know it is possible.
