Great news, but then again. When would (if ever, these products reach the market, i.e. the price/demand ratio would be sufficient to make it a commercial product).
Going to the source, this is what Samsung reports. http://www.samsung.com/global/business/semiconductor/news-events/press-releases/detail?newsId=12990
Researching for only 2 minutes I found a commentary from this site which I thought was "spot on", or at least better than the "wow" heard from others.
The benefit of this is increased density, more data in the same physical space. This should allow for slightly higher profits for Samsung and slightly lower cost's to the consumer once yields are of the appropriate proportions . Basically they can now drop 960(1024)GB into the space they used to put 480(512)GB using the same amount of silicon at the same fabrication scale(20nm).
Usually higher data transfer rates go hand in hand with increased data density, but SSD's already meet or exceed SATA3 specifications, so im not sure how much more performance you can expect until a faster bus becomes implemented.