Not to jump in but...
Casting with two hands is different in that you don't haul with the other hand and power + steer with the main hand as most are accustomed. Instead, both hands are on the rod and they share the power and steering of the cast. The bottom hand pulls while the top hand pushes. The bottom hand does a lot of the steering by coming in straight to the body. If the stroke path is straight, it's hard not to cast a long way because of the doubling of forces that load the rod, hence create the loop, thus throw the fly.
When I show someone how to use a 2hd rod, I first get them to relax completely and see if a very low power loop can be kept straight in both directions. If so, then a little slip of the line into the backcast and a tightened grip before the forward stroke and yer' off to the races with really only a slight increase in power from the easy loop warm-up. Once tuned into this stroke, add a little more power (but not a lot) and the whole line is out there in a hurry. One of the biggest problems is over-powering a two-handed rod.
This easy casting stroke is especially easy with shooting heads, which are great for striper fishing because we strip the line very close to shore with each cast, and the shooting heads are perfect for that kind of delivery - hence the popularity of the QD, Teeny, Rio Deep Sea, and other shooting head configurations under a different name.
The recently discussed LC13 head is an example of reaching 145' with no effort at all, the next step will be to adapt that configuration to shooting lines that are manageable and heads that are practical while reaching similar distances with equal ease.
In addition to shooting heads, longer belly lines handle nicely as well because the two-handed stroke can roll, switch and spey significantly easier than a single hander all things considered. My point is there is a finesse angle to these rods as well, I found them a pleasure to fish on the flats all summer long. If finesse and mending, long line manipulation is your bag, then a spey rod might be better. But for all-purpose, slam bang surf and rip action the faster, more aggressive taper is the way to go. This also allows for a shorter rod, which makes it great to strip the fly - it's not much different from a single hander once in the fly strip position, and both two-handed stripping and single handed stripping techniques are comfortable to use.
The single handed flyfishing approach is not invalidated, but it's one-dimensional. We don't always face conditions where it's the right tool for the job. For those bigger, badder, situations, one could go to a bigger single hander - and you will pay for it with bursitis bigtime.
Or you could use less effort for more distance and bigger flies, bigger fish handling, and a whole new world of exploration for line systems that will make staggering casts simple for the average disciple.
With spring the herring runs will come again. Each year, the biggest bass shun small flies while live-liners score on every drift. With enough interest and energy, the fly guys will figure out the lines, flies and presentations needed to go hand in hand with the live-liners in this fishery.
In my honest opinion, the ocean two-hander is an important part of this advance in coastal flyfishing ability.
And we haven't even begun to talk about subtropical opportunities...