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Re:Sony and Panasonic announce the Archival Disc format by gggggggg on Monday March 10, 2014 @04:28AM (#7371827)
From the 2013 release: "they intend to offer solutions that preserve valuable data for future generations".

No mention in the new release how long they are meant to last though. This seems like a pretty key point to me.

Re:Sony and Panasonic announce the Archival Disc format by ekianjo on Monday March 10, 2014 @05:39AM (#7372029)
Even if they are not meant to last, say, more than 10 years, you could back them up with fresh disks in 8-9 years timeframe and be good to go for another decade, What's important after is that the disk can still be read by newer drives later on.