Maybe it holds four SSDs on each side, so you could have eight 1TB SSDs at ludicrous speed. I'd be interested in that, if it were about $4000. You could have 8TB of SSD at 3-4000MB/sec, plus 16TB (4x4TB) HDDs in the normal slots for other data, a 1TB boot SSD in the optical bay.
25TB of data and your choice of GPU internally in the cMP. That would be nifty.