Black bear and small game is a silly rule, did they elaborate? Is Turkey small game?
As a stickbow shooter, I don't even consider X guns archery hunting, they have none of the characteristics of archery hunting, but the world does not seem to have come off it's axis, and I don't anticipate a huge increase in the number of hunters, not sure what the stats say.
So I am not in favour of airbows in the archery season, one novel reason in this case is that they are somewhat noisy, not sure if it is enough to mater.
That said, I actually think, while PCPs are a high hurdle for a lot of shooters to get over, this is one of the potentially best harvesting tools to come along. At one point my daughter was interested in coming hunting, and I felt that xbows were not terrible dangerous, but the energy does run over top of your supporting hand, and things like shotguns damage hearing. Arrows are extremely efficient, and less painful on game, and less damaging to meat than most alternatives, so I would like to see this tool get into the field for those that want it. I think it would be great for turkey, and big game in general.
On problem is that I don't think the co2 guns are ideal, and keeping it to PCP will be criticized as "elitest".