I think they really turned the corner on bows with the parallel limb technology. Then they started working on speed and brace height, which has also improved. Aggressive cams and eliminating shock on the bow when shot has made today's bows quite easy to shoot and shoot well.
Parallel limbs, speed and ease of shooting today's bow can be found in almost any brand made today. I don't know how much farther they can expand bows to improve on what we can buy today...
+1, each year they make minor tweaks mostly to get a little more speed. Usually at the sacrifice of brace height. I have a Carbon Defiant 2017 model that I really like. It's a short little bugger at 30" but shoots excellent. I use it to shoot indoor leagues all winter, a few 3D's in the summer and as an elk killer come fall. I shoot it as well as any bow I have ever owned. Would have never guessed that I'd shoot a 30" bow as well as the older 38"+ bows of the past but my scores tell the tale. (440+ / 450 Vegas or ~50X 300's on the NFAA face). I think one of the major changes to come along is learning to properly shoot a hinge type release. They work wonders to make one actually hold the pin on the target and execute a good shot.
