A new 800GB SKU of the Intel SSD 750 Series of PCIe SSDs was hinted at with the Skylake launch press materials, and it appears to have been a reality:
They may not be on the shelves yet, but appearing on ARK is a pretty good indicator that these are coming soon. We don't have pricing yet, but I would suspect a cost/GB closer to the 1.2TB model than to the 400GB model, which should come in at around $700. Performance sees a slight hit for the 800GB model, likely since this is an 'uneven' number of dies for the design of the SSD DC P3500 line it was based on.
Which would you prefer – a single 800GB or a pair of 400GB SSD 750's in a RAID (now that it is possible)?