14 DAY TRIAL // Since DVDs are basically children compared to Blu-ray discs, and BD are reaching their limit, especially when it comes to holding PS3 games and such, efforts are being put into new discs.
The latest effort comes on the part of Sony and Panasonic. The two have signed an agreement for the development of a new standard for professional-use optical discs.
Expanding archive business for long-term data storage is the main goal here.
Basically, the two will improve on their own and each other's existing technologies to make them more efficient.
Thus, by the end of 2015, we may see recording capacities of 300 GB. After that, the standard will steadily improve if things go well, until 1.5 TB is reached. I couldn't get a good feel for the time frame of that though.
The dust-resistance, water-resistance and general ability to survive in harsher environments than HDDs, SSDs, flash drives and everything else, is why optical discs are favored.