Nice article Dustin and it's pretty amazing what the combination of new technologies (high ISO bodies) and old ones (polarizers) can achieve in the right hands. I liked the photos as well and think the jellyfish one turned out really well.
The High ISO performance of this current generation is really pretty stunning. If another stop or so can be gained in the MKIV of the 5D line or the 6DII, it really changes the game. If you could treat ISO 12800 or even 25600 like you do 6400 now...wow!
The downside for the manufacturers is that photographer's need for primes is dropping. A two lens kit of a couple f/2.8 zooms (particularly with stabilizers) really covers most every need. Primes offer more creativity and flexibility with shallow DOF (and I love them), but I'm going out of the country to shoot a wedding next week and am only packing a 24-70 and 70-200 f/2.8 zooms.