Unfortunately, I don't believe that revolvers will ever be able to compete with Glock style appliance automatics due to the fact they don't lend themselves to being made out of rubber....and I'm perfectly happy about that.
Revolvers offer inherent advantages in power, accuracy and reliability over automatics. Automatics are superior in capacity, speed and size.
I think there are two designs changes that offer some real advantage to revolver evolution.
1. Modern integration of the gas seal system would lend itself very well to modern high powered revolvers like the 460 S&W.
a. It eliminates any chance of flame or gas cutting in high pressure, high velocity cartridges.
b. It ensures prefect alignment between cylinder chambers and barrel which improves accuracy.
c. The revolver can not ever be fired if it were out of time. No side spitting.
d. Substantial reduction in sound and concussion, especially in enclosed spaces...like a firing lane/booth.
e. Small but definite increase in velocity.
f. A suppressor could now be made effective.
2. Barrel alignment with the bottom chamber .
a. Reduction in felt recoil.
b. Decreased muzzle rise.
c. Improved balance.
I have a Nagant and it is true it has a 22 lb DA trigger pull. But it has nothing to do with the gas seal system. It has a 22 lb trigger no matter if the cylinder is installed or not. The gas seal system is extremely simple consisting of a small spring in front of the cylinder and a small pawl behind it.
I would sell a kidney to have a modern magnum, bottom barrel, gas seal revolver.